Posted by Support Staff on 2nd May 2017
What do ECM trouble codes mean for 1999-2002 Camaro and Firebird (OBD-II 5.7L)
Trouble Code: P0101
MAF Sensor Signal Range/Performance/
Trouble Code Conditions: DTC P0102, P0103, P0107, P0108, P0112, P0113,
P0121-P0123, P1111, P1112, P1120-P1122, P1220 and P1221 not set, engine
started, system voltage from 11-18v, TP angle under 95% ( 5%), MAP
signal over 17 kPa ( 3 kPa), conditions met for 1.5 seconds, and the P
Possible Causes:
Base engine vacuum leak, PCV valve leaking or stuck open
Engine oil dipstick missing or not fully seated
MAF sensor element (wire) is contaminated or it has failed
MAF sensor signal circuit or ground circuit has high resistance
PCM has failed
Trouble Code: P0101
MAF Sensor Signal Range/Performance/
Trouble Code Conditions: DTC P0102, P0103, P0107, P0108, P0112, P0113,
P0121-P0123, P1111, P1112, P1120-P1122, P1220 and P1221 not set, engine
started, system voltage from 11-18v, TP angle under 95% ( 5%), MAP
signal over 17 kPa ( 3 kPa), conditions met for 1.5 seconds, and the P
Possible Causes:
Base engine vacuum leak, PCV valve leaking or stuck open
Engine oil dipstick missing or not fully seated
MAF sensor element (wire) is contaminated or it has failed
MAF sensor signal circuit or ground circuit has high resistance
PCM has failed
Trouble Code: P0102
/MAF Sensor Circuit Low Frequency/
Trouble Code Conditions: Engine started; engine run-time over 3 seconds,
engine speed more than 400 rpm, system voltage 9-16v, and the PCM
detected the MAF sensor frequency was less than 10 Hz for 1.2 seconds.
Possible Causes:
Engine oil dipstick missing or not fully seated
MAF sensor element hot wire contaminated or the sensor failed
MAF sensor signal shorted to ground or ground circuit problem
MAF sensor wiring routed close to the ignition wires or motors
PCM has failed
Trouble Code: P0102
/MAF Sensor Circuit Low Frequency/
Trouble Code Conditions: Engine started; engine run-time over 3 seconds,
engine speed more than 400 rpm, system voltage 9-16v, and the PCM
detected the MAF sensor frequency was less than 10 Hz for 1.2 seconds.
Possible Causes:
Engine oil dipstick missing or not fully seated
MAF sensor element hot wire contaminated or the sensor failed
MAF sensor signal shorted to ground or ground circuit problem
MAF sensor wiring routed close to the ignition wires or motors
PCM has failed
Trouble Code: P0102
MAF Sensor Circuit Low Frequency/
Trouble Code Conditions: Engine started engine speed over 400 rpm for 3
seconds, system voltage 9-16v, and the PCM detected the MAF sensor
frequency was less than 1,300 Hz for 1.2 seconds.
Possible Causes:
Engine oil dipstick missing or not fully seated
MAF sensor element hot wire contaminated or the sensor failed
MAF sensor signal shorted to ground or ground circuit problem
MAF sensor wiring routed close to the ignition wires or motors
PCM has failed
Trouble Code: P0102
/MAF Sensor Circuit Low Frequency/
Trouble Code Conditions: Engine started engine speed over 400 rpm for 3
seconds, system voltage 9-16v, and the PCM detected the MAF sensor
frequency was less than 1,300 Hz for 1.2 seconds.
Possible Causes:
Engine oil dipstick missing or not fully seated
MAF sensor element hot wire contaminated or the sensor failed
MAF sensor signal shorted to ground or ground circuit problem
MAF sensor wiring routed close to the ignition wires or motors
PCM has failed
Trouble Code: P0103
/MAF Sensor Circuit High Frequency/
Trouble Code Conditions: Engine started engine speed more than 400 rpm,
system voltage over 8.0v, and the PCM detected the MAF frequency
indicated more than 14,000 Hz for over 1.2 seconds.
Possible Causes:
MAF sensor power circuit has a high resistance condition
MAF sensor is contaminated, dirty or it has failed
MAF sensor wiring routed too close to the Generator or to close to
ignition wires (this causes a EMI/REFI high frequency signal)
Water enters the sensor
Trouble Code: P0103
/MAF Sensor Circuit High Frequency/
Trouble Code Conditions: Engine started engine speed more than 400 rpm,
system voltage over 8.0v, and the PCM detected the MAF frequency
indicated more than 14,000 Hz for over 1.2 seconds.
Possible Causes:
MAF sensor power circuit has a high resistance condition
MAF sensor is contaminated, dirty or it has failed
MAF sensor wiring routed too close to the Generator or to close to
ignition wires (this causes a EMI/REFI high frequency signal)
Trouble Code: P0103
/MAF Sensor Circuit High Frequency/
Trouble Code Conditions: Engine started engine speed more than 400 rpm,
system voltage over 8.0v, and the PCM detected the MAF frequency
indicated more than 13,500 Hz for over 1.2 seconds.
Possible Causes:
MAF sensor power circuit has a high resistance condition
MAF sensor is contaminated, dirty or it has failed
MAF sensor wiring routed too close to the Generator or to close to
ignition wires (this causes a EMI/REFI high frequency signal)
Trouble Code: P0103
/MAF Sensor Circuit High Frequency/
Trouble Code Conditions: Engine started engine speed more than 400 rpm,
system voltage over 8.0v, and the PCM detected the MAF frequency
indicated more than 13,500 Hz for over 1.2 seconds.
Possible Causes:
MAF sensor power circuit has a high resistance condition
MAF sensor is contaminated, dirty or it has failed
MAF sensor wiring routed too close to the Generator or to close to
ignition wires (this causes a EMI/REFI high frequency signal)
Trouble Code: P0106
/MAP Sensor Signal Range/Performance/
Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0121-P0123 or
P0440-P0446 not set, engine speed from 400-5000 rpm with any change less
than 125 rpm, Traction Control "off", change in IAC position less than
10 g/sec, A/C clutch, Power Steering, Brake and Clutch switch signal
Possible Causes:
MAP sensor seal is missing or damage, intake manifold leaks
MAP sensor is contaminated, dirty, skewed or has failed
MAP sensor vacuum line is loose, restricted or contains "ice"
PCM has failed
Trouble Code: P0106
/MAP Sensor Signal Range/Performance/
Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0121-P0123 or
P0440-P0446 not set, engine speed from 400-5000 rpm with any change less
than 125 rpm, Traction Control "off", change in IAC position less than
10 g/sec, A/C clutch, Power Steering, Brake and Clutch switch sig
Possible Causes:
MAP sensor seal is missing or damage, intake manifold leaks
MAP sensor is contaminated, dirty, skewed or has failed
MAP sensor vacuum line is loose, restricted or contains "ice"
PCM has failed
Trouble Code: P0107
/MAP Sensor Circuit Low Input/
Trouble Code Conditions: DTC P0121, P0122 and P0123 not set, TP angle 0%
with engine speed under 800 rpm or over 12.5% with engine speed above
800 rpm, and the PCM detected the MAP sensor was under 0.10v for 4 seconds.
Possible Causes:
MAP sensor signal circuit shorted to sensor or chassis ground
MAP sensor power circuit open between the sensor and PCM
MAP sensor is damaged or has failed
PCM has failed
Trouble Code: P0107
/MAP Sensor Circuit Low Input/
Trouble Code Conditions: DTC P0121, P0122 and P0123 not set, TP angle 0%
with engine speed under 800 rpm or over 12.5% with engine speed above
800 rpm, and the PCM detected the MAP sensor was under 0.10v for 4 seconds.
Possible Causes:
MAP sensor signal circuit shorted to sensor or chassis ground
MAP sensor power circuit open between the sensor and PCM
MAP sensor is damaged or has failed
PCM has failed
Trouble Code: P0108
/MAP Sensor Circuit High Input/
Trouble Code Conditions: DTC P0121-P0123 not set, engine run-time
determined by the ECT sensor at start-up (it ranges from 4 minutes at
below -22ºF to under 30 seconds at above 86ºF), TP angle 0% with engine
speed under 1200 rpm or less than 12.5% with engine speed over 1200 rpm, a
Possible Causes:
MAP sensor signal circuit is open or it is shorted to VREF
MAP sensor ground circuit open between sensor and the PCM
MAP sensor is damaged or has failed
PCM has failed
This code can set due to a backfire or engine cranking too long
Trouble Code: P0108
/MAP Sensor Circuit High Input/
Trouble Code Conditions: DTC P0121-P0123 not set, engine run-time
determined by the ECT sensor at start-up (it ranges from 4 minutes at
below -22ºF to under 30 seconds at above 86ºF), TP angle 0% with engine
speed under 1200 rpm or less than 12.5% with engine speed over 1200 rpm, a
Possible Causes:
MAP sensor signal circuit is open or it is shorted to VREF
MAP sensor ground circuit open between sensor and the PCM
MAP sensor is damaged or has failed
PCM has failed
This code can set due to a backfire or engine cranking too long
Trouble Code: P0112
/IAT Sensor Circuit Low Input/
Trouble Code Conditions: DTC P0101, P0102, P0103, P0116, P0117, P0118,
P0125, P0128, P0500, P0502 and P0503 not set, engine started, engine
run-time from 10-45 seconds, VSS more than 25 mph, and the PCM detected
the IAT sensor was from 253-282ºF for 3-5 seconds in the CCM test.
Possible Causes:
IAT sensor signal circuit is shorted to sensor or chassis ground
IAT sensor is damaged or has failed (it may be shorted)
PCM has failed
Trouble Code: P0112
/IAT Sensor Circuit Low Input/
Trouble Code Conditions: DTC P0101, P0102, P0103, P0116, P0117, P0118,
P0125, P0128, P0500, P0502 and P0503 not set, engine started, engine
run-time from 10-45 seconds, VSS more than 25 mph, and the PCM detected
the IAT sensor was from 253-282ºF for 3-5 seconds in the CCM test.
Possible Causes:
IAT sensor signal circuit is shorted to sensor or chassis ground
IAT sensor is damaged or has failed (it may be shorted)
PCM has failed
Trouble Code: P0113
/IAT Sensor Circuit High Input/
Trouble Code Conditions: DTC P0101, P0102, P0103, P0116, P0117, P0118,
P0125, P0128, P0500, P0502 and P0503 not set, engine started, engine
run-time over 3 minutes, MAF sensor less than 8-15 g/sec, VSS less than
5-7 mph, ECT sensor more than 140ºF, and the PCM detected the IAT sen
Possible Causes:
IAT sensor signal circuit is open between the sensor and PCM
IAT sensor signal circuit is shorted to VREF or system power
IAT sensor is damaged or has failed (it may be open)
PCM has failed
Trouble Code: P0113
/IAT Sensor Circuit High Input/
Trouble Code Conditions: DTC P0101, P0102, P0103, P0116, P0117, P0118,
P0125, P0128, P0500, P0502 and P0503 not set, engine started, engine
run-time over 3 minutes, MAF sensor less than 8-15 g/sec, VSS less than
5-7 mph, ECT sensor more than 140ºF, and the PCM detected the IAT sen
Possible Causes:
IAT sensor signal circuit is open between the sensor and PCM
IAT sensor signal circuit is shorted to VREF or system power
IAT sensor is damaged or has failed (it may be open)
PCM has failed
Trouble Code: P0116
/ECT Sensor Signal Range/Performance/
Trouble Code Conditions: DTC P0112, P0113, P0117, P0118, P0125, P0128,
P0601, P0602, P1621 or P1683 not set, minimum soak time of 8 hours, key
on, the difference between the ECT and IAT sensor over 27-36ºF, engine
started, VSS over 15 mph for 5 minutes. If the IAT sensor decrease
Possible Causes:
ECT sensor circuit has an intermittent high resistance condition
ECT sensor circuit has an intermittent grounded condition
ECT sensor is out of calibration or "skewed"
Trouble Code: P0116
/ECT Sensor Signal Range/Performance/
Trouble Code Conditions: DTC P0112, P0113, P0117, P0118, P0125, P0128,
P0601, P0602, P1621 or P1683 not set, minimum soak time of 8 hours, key
on, the difference between the ECT and IAT sensor over 27-36ºF, engine
started, VSS over 15 mph for 5 minutes. If the IAT sensor decrease
Possible Causes:
ECT sensor circuit has an intermittent high resistance condition
ECT sensor circuit has an intermittent grounded condition
ECT sensor is out of calibration or "skewed"
Trouble Code: P0117
/ECT Sensor Circuit Low Input/
Trouble Code Conditions: Engine started; engine run-time under 10 seconds
(or more than 10 seconds if the ECT sensor is less than 122ºF at
start-up), and the PCM detected the ECT sensor was more than 282ºF for 20
seconds.
Possible Causes:
ECT sensor connector is damaged or shorted
ECT sensor signal circuit shorted to sensor or chassis ground
ECT sensor is damaged or has failed (it may be shorted)
PCM has failed
Trouble Code: P0117
/ECT Sensor Circuit Low Input/
Trouble Code Conditions: Engine started; engine run-time under 10 seconds
(or more than 10 seconds if the ECT sensor is less than 122ºF at
start-up), and the PCM detected the ECT sensor was more than 282ºF for 20
seconds.
Possible Causes:
ECT sensor connector is damaged or shorted
ECT sensor signal circuit shorted to sensor or chassis ground
ECT sensor is damaged or has failed (it may be shorted)
PCM has failed
Trouble Code: P0118
/ECT Sensor Circuit High Input/
Trouble Code Conditions: Engine run-time 15-60 seconds (or less than 60
seconds with the ECT sensor more than 32ºF at start-up), and the PCM
detected the ECT sensor indicated less than -36ºF for 20 seconds.
Possible Causes:
ECT sensor connector is damaged, loose or open
ECT sensor signal circuit is open between the sensor and PCM
ECT sensor signal circuit is shorted to VREF or system power
ECT sensor is damaged or has failed (it may be open)
PCM has failed
Trouble Code: P0118
/ECT Sensor Circuit High Input/
Trouble Code Conditions: Engine run-time 15-60 seconds (or less than 60
seconds with the ECT sensor more than 32ºF at start-up), and the PCM
detected the ECT sensor indicated less than -36ºF for 20 seconds.
Possible Causes:
ECT sensor connector is damaged, loose or open
ECT sensor signal circuit is open between the sensor and PCM
ECT sensor signal circuit is shorted to VREF or system power
ECT sensor is damaged or has failed (it may be open)
PCM has failed
Trouble Code: P0121
/TP Sensor Circuit Insufficient Activity/
Trouble Code Conditions: DTC P0107, P0108, P0122, P0123, P1122P and 1123
not set, engine started, engine run-time over 2 minutes, ECT sensor more
than 158ºF, MAP sensor less than 40 kPa, or with the MAP more than 67
kPa and steady, and the PCM detected the predicted TP angle did n
Possible Causes:
TP sensor signal circuit open or shorted to ground (intermittent)
TP sensor VREF circuit is open or shorted (intermittent fault)
TP sensor is damaged or it failed (may be cracked or sticking)
Trouble Code: P0121
/TP Sensor Circuit Insufficient Activity/
Trouble Code Conditions: DTC P0107, P0108, P0122, P0123, P1122P and 1123
not set, engine started, engine run-time over 2 minutes, ECT sensor more
than 158ºF, MAP sensor less than 40 kPa, or with the MAP more than 67
kPa and steady
Possible Causes:
TP sensor signal circuit open or shorted to ground (intermittent)
TP sensor VREF circuit is open or shorted (intermittent fault)
TP sensor is damaged or it failed (may be cracked or sticking)
Trouble Code: P0121
/TP Sensor Signal Range/Performance/
Trouble Code Conditions: DTC P0606, P1517 and P1518 not set, key in the
crank or run mode, system voltage over 5.23v, and the PCM detected the
APP 1 disagreed with the APP 2 sensor by over 10.5%, or the APP 1 sensor
disagreed with the APP 3 sensor by over 13% for 1 second.
Possible Causes:
TP sensor signal circuit is shorted to ground (intermittent fault)
TP sensor signal circuit is open (an intermittent fault)
TP sensor VREF circuit is open or shorted (intermittent fault)
TP sensor is damaged or it failed (may be cracked or sticking)
Trouble Code: P0121
/TP Sensor Signal Range/Performance/
Trouble Code Conditions: DTC P0606, P1517 and P1518 not set, key in the
crank or run mode, system voltage over 5.23v, and the PCM detected the
APP 1 disagreed with the APP 2 sensor by over 10.5%, or the APP 1 sensor
disagreed with the APP 3 sensor by over 13% for 1 second.
Possible Causes:
TP sensor signal circuit is shorted to ground (intermittent fault)
TP sensor signal circuit is open (an intermittent fault)
TP sensor VREF circuit is open or shorted (intermittent fault)
TP sensor is damaged or it failed (may be cracked or sticking)
Trouble Code: P0122
/TP Sensor Circuit Low Input/
Trouble Code Conditions: Key on or engine running; and the PCM detected
the TP sensor signal was less than 0.20v for 10 seconds. The PCM uses
the TP sensor signal to determine the throttle plate angle for various
engine controls. The TP sensor is a potentiometer type sensor with
Possible Causes:
TP sensor signal circuit is shorted to sensor ground
TP sensor signal circuit is open (except 1996-1998 models)
TP sensor VREF circuit is open between sensor and PCM
TP sensor is damaged or it failed (it may be shorted)
PCM is damaged or has failed
Trouble Code: P0122
/TP Sensor Circuit Low Input/
Trouble Code Conditions: Key on or engine running; and the PCM detected
the TP sensor signal was less than 0.20v for 10 seconds. The PCM uses
the TP sensor signal to determine the throttle plate angle for various
engine controls. The TP sensor is a potentiometer type sensor with
Possible Causes:
TP sensor signal circuit is shorted to sensor ground
TP sensor signal circuit is open (except 1996-1998 models)
TP sensor VREF circuit is open between sensor and PCM
TP sensor is damaged or it failed (it may be shorted)
PCM is damaged or has failed
Trouble Code: P0123
/TP Sensor Circuit High Input/
Trouble Code Conditions: Key on or engine running; and the PCM detected
the TP sensor was more than 4.75v for 10 seconds. The TP sensor is a
potentiometer with reference, ground circuit and signal circuit.
Possible Causes:
TP sensor signal circuit is shorted to VREF or system power
TP sensor ground circuit is open between the sensor and PCM
TP sensor is damaged or it failed (it may be open)
PCM is damaged or has failed
Trouble Code: P0123
/TP Sensor Circuit High Input/
Trouble Code Conditions: Key on or engine running; and the PCM detected
the TP sensor was more than 4.75v for 10 seconds. The TP sensor is a
potentiometer with reference, ground circuit and signal circuit.
Possible Causes:
TP sensor signal circuit is shorted to VREF or system power
TP sensor ground circuit is open between the sensor and PCM
TP sensor is damaged or it failed (it may be open)
PCM is damaged or has failed
Trouble Code: P0125
/ECT Excessive Time To Enter Closed Loop/
Trouble Code Conditions: DTC P0110-P0113, P0116-P0118, P0128, P1114 and
P1115 not set, engine run-time from 2 to 22 minutes, ECT sensor below
83ºF at start-up, IAT sensor from 19-131ºF, MAF sensor from 15-75 g/sec
with the average over 14 g/sec, VSS over 3 mph for 1.5 miles, and the
Possible Causes:
Check the operation of the thermostat (it may be stuck open)
Coolant level is too low, or the coolant mixture is incorrect
ECT sensor signal circuit has a high resistance condition
ECT sensor is damaged or it has failed
Trouble Code: P0125
/ECT Excessive Time To Enter Closed Loop/
Trouble Code Conditions: DTC P0110-P0113, P0116-P0118, P0128, P1114 and
P1115 not set, engine run-time from 2 to 22 minutes, ECT sensor below
83ºF at start-up, IAT sensor from 19-131ºF, MAF sensor from 15-75 g/sec
with the average over 14 g/sec, VSS over 3 mph for 1.5 miles, and the
Possible Causes:
Check the operation of the thermostat (it may be stuck open)
Coolant level is too low, or the coolant mixture is incorrect
ECT sensor signal circuit has a high resistance condition
ECT sensor is damaged or it has failed
Trouble Code: P0128
/ECT Sensor Below Thermostat Regulating Temperature/
Trouble Code Conditions: DTC P0100-P0103, P0110-P0113, P0116-P0118,
P0125, P0500, P0501-P0503, P1111-P1115 not set, ECT sensor less than
158ºF at start-up, IAT sensor from 19-131ºF, engine run-time at 2-22
minutes, MAF sensor at 15-75 g/sec (avg. 14 g/sec), VSS over 3 mph for
1.5 m
Possible Causes:
Check the operation of the thermostat (it may be stuck open)
Coolant level is too low, or the coolant mixture is incorrect
ECT sensor signal circuit has a high resistance condition
ECT sensor is damaged or it has failed
Trouble Code: P0128
/ECT Sensor Below Thermostat Regulating Temperature/
Trouble Code Conditions: DTC P0100-P0103, P0110-P0113, P0116-P0118,
P0125, P0500, P0501-P0503, P1111-P1115 not set, ECT sensor less than
158ºF at start-up, IAT sensor from 19-131ºF, engine run-time at 2-22
minutes, MAF sensor at 15-75 g/sec (avg. 14 g/sec), VSS over 3 mph for
1.5 m
Possible Causes:
Check the operation of the thermostat (it may be stuck open)
Coolant level is too low, or the coolant mixture is incorrect
ECT sensor signal circuit has a high resistance condition
ECT sensor is damaged or it has failed
Trouble Code: P0131
/HO2S-11 (Bank 1 Sensor 1) Circuit Low Input/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0113,
P0116-P0118, P0121-P0123, P0125, P0128, P0200, P0300, P0410-P0446,
P0452-P0453, P1258, P1415-P1416 and P1441 not set, engine running in
closed loop, Intrusive and Scan Tool tests off, A/F ratio at
14.5-14.8:1, TP
Possible Causes:
Air leaks in the exhaust system, intake manifold, vacuum lines
Engine misfire condition present (look for P0300 series codes)
Fuel system too lean (possible low fuel pressure, water in fuel)
HO2S signal circuit is shorted to the sensor or chassis ground
Trouble Code: P0131
/HO2S-11 (Bank 1 Sensor 1) Circuit Low Input/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0113,
P0116-P0118, P0121-P0123, P0125, P0128, P0200, P0300, P0410-P0446,
P0452-P0453, P1258, P1415-P1416 and P1441 not set, engine running in
closed loop, Intrusive and Scan Tool tests off, A/F ratio at
14.5-14.8:1, TP
Possible Causes:
Air leaks in the exhaust system, intake manifold, vacuum lines
Engine misfire condition present (look for P0300 series codes)
Fuel system too lean (possible low fuel pressure, water in fuel)
HO2S signal circuit is shorted to the sensor or chassis ground
Trouble Code: P0132
/HO2S-11 (Bank 1 Sensor 1) Circuit High Input/
Trouble Code Conditions: DTC P0101, P0102, P0103, P0106, P0107, P0108,
P0112-P0118, P0121, P0122, P0123, P0125, P0128, P0200, P0300, P0410,
P0440-P0446, P0452, P0453, P1258, P1415, P1416 and P1441 not set, engine
started, system voltage over 10.0v, fuel level over 10%, Intrusive
Possible Causes:
Fuel system is too rich (fuel pressure too high, fuel pressure regulator
leaking, or one or more fuel injectors sticking/leaking)
HO2S element is silicon, water or fuel contaminated
HO2S signal tracking (water intrusion) in the connector causing a short
Trouble Code: P0132
/HO2S-11 (Bank 1 Sensor 1) Circuit High Input/
Trouble Code Conditions: DTC P0101, P0102, P0103, P0106, P0107, P0108,
P0112-P0118, P0121, P0122, P0123, P0125, P0128, P0200, P0300, P0410,
P0440-P0446, P0452, P0453, P1258, P1415, P1416 and P1441 not set, engine
started, system voltage over 10.0v, fuel level over 10%, Intrusive
Possible Causes:
Fuel system is too rich (fuel pressure too high, fuel pressure regulator
leaking, or one or more fuel injectors sticking/leaking)
HO2S element is silicon, water or fuel contaminated
HO2S signal tracking (water intrusion) in the connector causing a short
Trouble Code: P0133
/HO2S-11 (Bank 1 Sensor 1) Slow Response/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0118,
P0121-P0123, P0125, P0128, P-131-P0135, P0151-P0155, P0200, P0300,
P0410, P0440-P0446, P0452-P0453, P1258, P1415-P1416 and P1441 not set,
engine started, engine speed 1000-2300 rpm for 60 seconds, system voltage
Possible Causes:
Exhaust leak present in the exhaust manifold or exhaust pipes
Fuel system is too rich (fuel pressure too high, fuel pressure regulator
leaking, or one or more fuel injectors sticking/leaking)
HO2S element is silicon, water or fuel contaminated or it fail
Trouble Code: P0133
/HO2S-11 (Bank 1 Sensor 1) Slow Response/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0118,
P0121-P0123, P0125, P0128, P-131-P0135, P0151-P0155, P0200, P0300,
P0410, P0440-P0446, P0452-P0453, P1258, P1415-P1416 and P1441 not set,
engine started, engine speed 1000-2300 rpm for 60 seconds, system voltage
Possible Causes:
Exhaust leak present in the exhaust manifold or exhaust pipes
Fuel system is too rich (fuel pressure too high, fuel pressure regulator
leaking, or one or more fuel injectors sticking/leaking)
HO2S element is silicon, water or fuel contaminated or it fail
Trouble Code: P0134
/HO2S-11 (Bank 1 Sensor 1) Insufficient Activity/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0118,
P0121-P0123, P0125, P0128, P0200, P0300, P0410, P0440-P0446, P0452,
P0453, P1258, P1415-P1416 and P1441 not set, engine run-time over 409
seconds, Scan Tool and Intrusive tests "off", system voltage over 10.0v and
Possible Causes:
HO2S heater is damaged or has failed
HO2S signal or ground circuit has a high resistance condition
HO2S signal circuit is open or shorted to system power (B+)
HO2S has failed (i.e., it is silicon, water or fuel contaminated)
PCM has failed
Trouble Code: P0134
/HO2S-11 (Bank 1 Sensor 1) Insufficient Activity/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0118,
P0121-P0123, P0125, P0128, P0200, P0300, P0410, P0440-P0446, P0452,
P0453, P1258, P1415-P1416 and P1441 not set, engine run-time over 409
seconds, Scan Tool and Intrusive tests "off", system voltage over 10.0v and
Possible Causes:
HO2S heater is damaged or has failed
HO2S signal or ground circuit has a high resistance condition
HO2S signal circuit is open or shorted to system power (B+)
HO2S has failed (i.e., it is silicon, water or fuel contaminated)
PCM has failed
Trouble Code: P0135
/HO2S-11 (Bank 1 Sensor 1) Heater Circuit Malfunction/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0118,
P0121-P0123, P0125, P0128, P0131-P0138, P0140, P0151-P0158, P0160,
P0200, P0300, P0410, P0440-P0446, P0452, P0453, P1258, P1415, P1416 or
P1441 not set, ECT and IAT sensors under 122ºF and within 14.5ºF and HO2S
Possible Causes:
HO2S heater ground circuit is open or has high resistance
HO2S heater power circuit is open (test O2S fuse in fuse block)
HO2S heater element is damaged or has failed
PCM has failed
Trouble Code: P0135
/HO2S-11 (Bank 1 Sensor 1) Heater Circuit Malfunction/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0118,
P0121-P0123, P0125, P0128, P0131-P0138, P0140, P0151-P0158, P0160,
P0200, P0300, P0410, P0440-P0446, P0452, P0453, P1258, P1415, P1416 or
P1441 not set, ECT and IAT sensors under 122ºF and within 14.5ºF and HO2S
Possible Causes:
HO2S heater ground circuit is open or has high resistance
HO2S heater power circuit is open (test O2S fuse in fuse block)
HO2S heater element is damaged or has failed
PCM has failed
Trouble Code: P0137
/HO2S-12 (Bank 1 Sensor 2) Circuit Low Input Conditions/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0113,
P0116-P0118, P0121-P0123, P0125, P0128, P0200, P0300, P0410-P0446,
P0452-P0453, P1258, P1415-P1416 and P1441 not set, engine started,
engine running in closed loop, Intrusive and Scan Tool tests "off", A/F
ratio
Possible Causes:
Air leaks in the exhaust system, intake manifold, vacuum lines
Engine misfire condition present (look for P0300 series codes)
Fuel system too lean (possible low fuel pressure, water in fuel)
HO2S signal circuit is shorted to the sensor or chassis ground
Trouble Code: P0137
/HO2S-12 (Bank 1 Sensor 2) Circuit Low Input Conditions/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0113,
P0116-P0118, P0121-P0123, P0125, P0128, P0200, P0300, P0410-P0446,
P0452-P0453, P1258, P1415-P1416 and P1441 not set, engine started,
engine running in closed loop, Intrusive and Scan Tool tests "off", A/F
ratio
Possible Causes:
Air leaks in the exhaust system, intake manifold, vacuum lines
Engine misfire condition present (look for P0300 series codes)
Fuel system too lean (possible low fuel pressure, water in fuel)
HO2S signal circuit is shorted to the sensor or chassis ground
Trouble Code: P0138
/HO2S-12 (Bank 1 Sensor 2) Circuit High Input/
Trouble Code Conditions: DTC P0101, P0102, P0103, P0106, P0107, P0108,
P0112-P0118, P0121, P0122, P0123, P0125, P0128, P0200, P0300, P0410,
P0440-P0446, P0452, P0453, P1258, P1415, P1416 and P1441 not set, engine
started, system voltage over 10.0v, fuel level over 10%, Intrusive
Possible Causes:
Fuel system is too rich (fuel pressure too high, fuel pressure regulator
leaking, or one or more fuel injectors sticking/leaking)
HO2S element is silicon, water or fuel contaminated
HO2S signal circuit is shorted to system power (B+)
Trouble Code: P0138
/HO2S-12 (Bank 1 Sensor 2) Circuit High Input/
Trouble Code Conditions: DTC P0101, P0102, P0103, P0106, P0107, P0108,
P0112-P0118, P0121, P0122, P0123, P0125, P0128, P0200, P0300, P0410,
P0440-P0446, P0452, P0453, P1258, P1415, P1416 and P1441 not set, engine
started, system voltage over 10.0v, fuel level over 10%, Intrusive
Possible Causes:
Fuel system is too rich (fuel pressure too high, fuel pressure regulator
leaking, or one or more fuel injectors sticking/leaking)
HO2S element is silicon, water or fuel contaminated
HO2S signal circuit is shorted to system power (B+)
Trouble Code: P0140
/HO2S-12 (Bank 1 Sensor 2) Insufficient Activity/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0118,
P0121-P0123, P0125, P0128, P0200, P0300, P0410, P0440-P0446, P0452,
P0453, P1258, P1415-P1416 and P1441 not set, engine started, engine
run-time over 409 seconds, Scan Tool and Intrusive tests "off"
Possible Causes:
Exhaust leak present in the exhaust manifold or exhaust pipes
HO2S signal or ground circuit has a high resistance condition
HO2S element is silicon, water or fuel contaminated
PCM has failed
Trouble Code: P0140
/HO2S-12 (Bank 1 Sensor 2) Insufficient Activity/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0118,
P0121-P0123, P0125, P0128, P0200, P0300, P0410, P0440-P0446, P0452,
P0453, P1258, P1415-P1416 and P1441 not set, engine started, engine
run-time over 409 seconds, Scan Tool and Intrusive tests "off", system
voltage
Possible Causes:
Exhaust leak present in the exhaust manifold or exhaust pipes
HO2S signal or ground circuit has a high resistance condition
HO2S element is silicon, water or fuel contaminated
PCM has failed
Trouble Code: P0141
/HO2S-12 (Bank 1 Sensor 2) Heater Circuit Malfunction/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0118,
P0121-P0123, P0125, P0128, P0131-P0138, P0140, P0151-P0158, P0160,
P0200, P0300, P0410, P0440-P0446, P0452, P0453, P1258, P1415, P1416 or
P1441 not set, engine running in closed loop, ECT and IAT sensors under 12
Possible Causes:
HO2S heater ground circuit is open or has high resistance
HO2S heater power circuit is open (test O2S fuse in fuse block)
HO2S heater element is damaged or has failed
PCM has failed
Trouble Code: P0141
/HO2S-12 (Bank 1 Sensor 2) Heater Circuit Malfunction/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0118,
P0121-P0123, P0125, P0128, P0131-P0138, P0140, P0151-P0158, P0160,
P0200, P0300, P0410, P0440-P0446, P0452, P0453, P1258, P1415, P1416 or
P1441 not set, engine running in closed loop, ECT and IAT sensors under 12
Possible Causes:
HO2S heater ground circuit is open or has high resistance
HO2S heater power circuit is open (test O2S fuse in fuse block)
HO2S heater element is damaged or has failed
PCM has failed
Trouble Code: P0151
/HO2S-21 (Bank 2 Sensor 1) Circuit Low Input/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0113,
P0116-P0118, P0121-P0123, P0125, P0128, P0200, P0300, P0410-P0446,
P0452-P0453, P1258, P1415-P1416 and P1441 not set, engine started,
engine running in closed loop, Intrusive and Scan Tool tests "off", A/F
ratio
Possible Causes:
Air leaks in the exhaust system, intake manifold, vacuum lines
Engine misfire condition present (look for P0300 series codes)
Fuel system too lean (possible low fuel pressure, water in fuel)
HO2S signal circuit is shorted to the sensor or chassis ground
Trouble Code: P0151
/HO2S-21 (Bank 2 Sensor 1) Circuit Low Input/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0113,
P0116-P0118, P0121-P0123, P0125, P0128, P0200, P0300, P0410-P0446,
P0452-P0453, P1258, P1415-P1416 and P1441 not set, engine started,
engine running in closed loop, Intrusive and Scan Tool tests "off", A/F
ratio
Possible Causes:
Air leaks in the exhaust system, intake manifold, vacuum lines
Engine misfire condition present (look for P0300 series codes)
Fuel system too lean (possible low fuel pressure, water in fuel)
HO2S signal circuit is shorted to the sensor or chassis ground
Trouble Code: P0152
/HO2S-21 (Bank 2 Sensor 1) Circuit High Input/
Trouble Code Conditions: DTC P0101, P0102, P0103, P0106, P0107, P0108,
P0112-P0118, P0121, P0122, P0123, P0125, P0128, P0200, P0300, P0410,
P0440-P0446, P0452, P0453, P1258, P1415, P1416 and P1441 not set, engine
started, system voltage over 10.0v, fuel level over 10%, Intrusive
Possible Causes:
Fuel system rich (high fuel pressure, fuel pressure regulator leaking,
or leaking injector)
HO2S element is silicon, water or fuel contaminated
HO2S signal circuit is shorted to system power (B+)
HO2S signal tracking (water intrusion) in the connector
Trouble Code: P0152
/HO2S-21 (Bank 2 Sensor 1) Circuit High Input/
Trouble Code Conditions: DTC P0101, P0102, P0103, P0106, P0107, P0108,
P0112-P0118, P0121, P0122, P0123, P0125, P0128, P0200, P0300, P0410,
P0440-P0446, P0452, P0453, P1258, P1415, P1416 and P1441 not set, engine
started, system voltage over 10.0v, fuel level over 10%, Intrusive
Possible Causes:
Fuel system rich (high fuel pressure, fuel pressure regulator leaking,
or leaking injector)
HO2S element is silicon, water or fuel contaminated
HO2S signal circuit is shorted to system power (B+)
HO2S signal tracking (water intrusion) in the connector
Trouble Code: P0153
/HO2S-21 (Bank 2 Sensor 1) Slow Response/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112, P0113,
P0116-P0118, P0121-P0123, P0125, P0128, P-131-P0135, P0151-P0155, P0200,
P0300, P0410, P0440-P0446, P0452-P0453, P1258, P1415-P1416 and P1441 not
set, engine started, engine speed 1000-2300 rpm for 60 seconds, s
Possible Causes:
Exhaust leak present in the exhaust manifold or exhaust pipes
Fuel system is too rich (fuel pressure too high, fuel pressure regulator
leaking, or one or more fuel injectors sticking/leaking)
HO2S element is silicon, water or fuel contaminated or it fail
Trouble Code: P0153
/HO2S-21 (Bank 2 Sensor 1) Slow Response/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112, P0113,
P0116-P0118, P0121-P0123, P0125, P0128, P-131-P0135, P0151-P0155, P0200,
P0300, P0410, P0440-P0446, P0452-P0453, P1258, P1415-P1416 and P1441 not
set, engine started, engine speed 1000-2300 rpm for 60 seconds, s
Possible Causes:
Exhaust leak present in the exhaust manifold or exhaust pipes
Fuel system is too rich (fuel pressure too high, fuel pressure regulator
leaking, or one or more fuel injectors sticking/leaking)
HO2S element is silicon, water or fuel contaminated or it fail
Trouble Code: P0154
/HO2S-21 (Bank 2 Sensor 1) Insufficient Activity/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0118,
P0121-P0123, P0125, P0128, P0200, P0300, P0410, P0440-P0446, P0452,
P0453, P1258, P1415-P1416 and P1441 not set, engine run-time over 409
seconds, Scan Tool and Intrusive tests "off", system voltage over 10.0v and
Possible Causes:
HO2S heater is damaged or has failed
HO2S signal or ground circuit has a high resistance condition
HO2S signal circuit is open or shorted to system power (B+)
HO2S has failed (i.e., it is silicon, water or fuel contaminated)
PCM has failed
Trouble Code: P0154
/HO2S-21 (Bank 2 Sensor 1) Insufficient Activity/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0118,
P0121-P0123, P0125, P0128, P0200, P0300, P0410, P0440-P0446, P0452,
P0453, P1258, P1415-P1416 and P1441 not set, engine run-time over 409
seconds, Scan Tool and Intrusive tests "off", system voltage over 10.0v and
Possible Causes:
HO2S heater is damaged or has failed
HO2S signal or ground circuit has a high resistance condition
HO2S signal circuit is open or shorted to system power (B+)
HO2S has failed (i.e., it is silicon, water or fuel contaminated)
PCM has failed
Trouble Code: P0155
/HO2S-21 (Bank 2 Sensor 1) Heater Circuit Malfunction/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0118,
P0121-P0123, P0125, P0128, P0131-P0138, P0140, P0151-P0158, P0160,
P0200, P0300, P0410, P0440-P0446, P0452, P0453, P1258, P1415, P1416 or
P1441 not set, engine started, ECT and IAT sensors under 122ºF and within
Possible Causes:
HO2S heater ground circuit is open or has high resistance
HO2S heater power circuit is open (test O2S fuse in fuse block)
HO2S heater element is damaged or has failed
PCM has failed
Trouble Code: P0155
HO2S-21 (Bank 2 Sensor 1) Heater Circuit Malfunction/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0118,
P0121-P0123, P0125, P0128, P0131-P0138, P0140, P0151-P0158, P0160,
P0200, P0300, P0410, P0440-P0446, P0452, P0453, P1258, P1415, P1416 or
P1441 not set, engine started, ECT and IAT sensors under 122ºF
Possible Causes:
HO2S heater ground circuit is open or has high resistance
HO2S heater power circuit is open (test O2S fuse in fuse block)
HO2S heater element is damaged or has failed
PCM has failed
Trouble Code: P0157
/HO2S-22 (Bank 2 Sensor 2) Circuit Low Input/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0113,
P0116-P0118, P0121-P0123, P0125, P0128, P0200, P0300, P0410-P0446,
P0452-P0453, P1258, P1415-P1416 and P1441 not set, engine started,
engine running in closed loop, Intrusive and Scan Tool tests "off", A/F
ratio
Possible Causes:
Air leaks in the exhaust system, intake manifold, vacuum lines
Engine misfire condition present (look for P0300 series codes)
Fuel system too lean (possible low fuel pressure, water in fuel)
HO2S signal circuit is shorted to the sensor or chassis ground
Trouble Code: P0157
/HO2S-22 (Bank 2 Sensor 2) Circuit Low Input/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0113,
P0116-P0118, P0121-P0123, P0125, P0128, P0200, P0300, P0410-P0446,
P0452-P0453, P1258, P1415-P1416 and P1441 not set, engine started,
engine running in closed loop, Intrusive and Scan Tool tests "off", A/F
ratio
Possible Causes:
Air leaks in the exhaust system, intake manifold, vacuum lines
Engine misfire condition present (look for P0300 series codes)
Fuel system too lean (possible low fuel pressure, water in fuel)
HO2S signal circuit is shorted to the sensor or chassis ground
Trouble Code: P0158
/HO2S-22 (Bank 2 Sensor 2) Circuit High Input/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0118,
P0121-P0123, P0125, P0128, P0200, P0300, P0410, P0440-P0453, P1258,
P1415, P1416 and P1441 not set, engine started, system voltage over
10.0v, fuel level over 10%, Intrusive and Scan Tool tests "off"
Possible Causes:
Fuel system rich (high fuel pressure, fuel pressure regulator leaking,
or injector sticking)
HO2S element is silicon, water or fuel contaminated
HO2S signal circuit is shorted to system power (B+)
HO2S signal tracking (water intrusion) in the connector
Trouble Code: P0158
/HO2S-22 (Bank 2 Sensor 2) Circuit High Input/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0118,
P0121-P0123, P0125, P0128, P0200, P0300, P0410, P0440-P0453, P1258,
P1415, P1416 and P1441 not set, engine started, system voltage over
10.0v, fuel level over 10%, Intrusive and Scan Tool tests "off"
Possible Causes:
Fuel system rich (high fuel pressure, fuel pressure regulator leaking,
or injector sticking)
HO2S element is silicon, water or fuel contaminated
HO2S signal circuit is shorted to system power (B+)
HO2S signal tracking (water intrusion) in the connector
Trouble Code: P0160
/HO2S-22 (Bank 2 Sensor 2) Insufficient Activity/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0118,
P0121-P0123, P0125, P0128, P0200, P0300, P0410, P0440-P0446, P0452,
P0453, P1258, P1415-P1416 and P1441 not set, engine started, engine
run-time over 409 seconds, Scan Tool and Intrusive tests "off", system
voltage
Possible Causes:
Exhaust leak present in the exhaust manifold or exhaust pipes
HO2S signal or ground circuit has a high resistance condition
HO2S element is silicon, water or fuel contaminated
PCM has failed
Trouble Code: P0160
/HO2S-22 (Bank 2 Sensor 2) Insufficient Activity/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0118,
P0121-P0123, P0125, P0128, P0200, P0300, P0410, P0440-P0446, P0452,
P0453, P1258, P1415-P1416 and P1441 not set, engine started, engine
run-time over 409 seconds, Scan Tool and Intrusive tests "off", system
voltage
Possible Causes:
Exhaust leak present in the exhaust manifold or exhaust pipes
HO2S signal or ground circuit has a high resistance condition
HO2S element is silicon, water or fuel contaminated
PCM has failed
Trouble Code: P0161
/HO2S-22 (Bank 2 Sensor 2) Heater Circuit Malfunction/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0118,
P0121-P0123, P0125, P0128, P0131-P0138, P0140, P0151-P0158, P0160,
P0200, P0300, P0410, P0440-P0446, P0452, P0453, P1258, P1415, P1416 or
P1441 not set, ECT and IAT sensors under 122ºF and within 14.5ºF at start-up
Possible Causes:
HO2S heater ground circuit is open or has high resistance
HO2S heater power circuit is open (test O2S fuse in fuse block)
HO2S heater element is damaged or has failed
PCM has failed
Trouble Code: P0161
/HO2S-22 (Bank 2 Sensor 2) Heater Circuit Malfunction/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0118,
P0121-P0123, P0125, P0128, P0131-P0138, P0140, P0151-P0158, P0160,
P0200, P0300, P0410, P0440-P0446, P0452, P0453, P1258, P1415, P1416 or
P1441 not set, ECT and IAT sensors under 122ºF and within 14.5ºF at start-up
Possible Causes:
HO2S heater ground circuit is open or has high resistance
HO2S heater power circuit is open (test O2S fuse in fuse block)
HO2S heater element is damaged or has failed
PCM has failed
Trouble Code: P0171
/Fuel Trim System Lean (Bank 1)/
Trouble Code Conditions: DTC P0101-P0103, P0107-P0108, P0112-P0113,
P0117-P0118, P0121-P0125, P0200, P0300, P0335-P0336, P0351-P0358, P0405,
P0410, P0412, P0418, P0443, P0500-P0503, P1258, P1404, P1415 and P1416
not set, engine running, VSS under 85 mph at 400-3000 rpm, BARO sens
Possible Causes:
Air leaks in intake manifold, exhaust pipes or exhaust manifold
Fuel control sensor is out of calibration (ECT, IAT or MAF)
Low fuel pressure (fuel filter clogged, pressure regulator failure)
One or more injectors restricted or pressure regulator has failed
Trouble Code: P0171
Fuel Trim System Lean (Bank 1)/
Trouble Code Conditions: DTC P0101-P0103, P0107-P0108, P0112-P0113,
P0117-P0118, P0121-P0125, P0200, P0300, P0335-P0336, P0351-P0358, P0405,
P0410, P0412, P0418, P0443, P0500-P0503, P1258, P1404, P1415 and P1416
not set, engine running, VSS under 85 mph at 400-3000 rpm
Possible Causes:
Air leaks in intake manifold, exhaust pipes or exhaust manifold
Fuel control sensor is out of calibration (ECT, IAT or MAF)
Low fuel pressure (fuel filter clogged, pressure regulator failure)
One or more injectors restricted or pressure regulator has failed
Trouble Code: P0172
/Fuel Trim System Rich (Bank 1)/
Trouble Code Conditions: DTC P0101-P0103, P0107-P0108, P0112-P0113,
P0116-P0118, P0121-P0125, P0200, P0300, P0335-P0336, P0351-P0358, P0405,
P0410, P0412, P0418, P0443, P0500-P0503, P1258, P1404, P1415 and P1416
not set, engine started, vehicle driven at less than 85 mph at 400-3
Possible Causes:
Base engine "mechanical" fault affecting one or more cylinders
Excess fuel vapors in crankcase (the oil needs to be changed)
EVAP system component has failed or canister fuel saturated
Fuel control sensor is out of calibration (i.e., ECT, IAT or MAF)
Trouble Code: P0172
/Fuel Trim System Rich (Bank 1)/
Trouble Code Conditions: DTC P0101-P0103, P0107-P0108, P0112-P0113,
P0116-P0118, P0121-P0125, P0200, P0300, P0335-P0336, P0351-P0358, P0405,
P0410, P0412, P0418, P0443, P0500-P0503, P1258, P1404, P1415 and P1416
not set, engine started, vehicle driven at less than 85 mph at 400-3
Possible Causes:
Base engine "mechanical" fault affecting one or more cylinders
Excess fuel vapors in crankcase (the oil needs to be changed)
EVAP system component has failed or canister fuel saturated
Fuel control sensor is out of calibration (i.e., ECT, IAT or MAF)
Trouble Code: P0174
/Fuel Trim System Lean (Bank 2)/
Trouble Code Conditions: DTC P0101-P0103, P0107-P0108, P0112-P0113,
P0117-P0118, P0121-P0125, P0200, P0300, P0335-P0336, P0351-P0358, P0405,
P0410, P0412, P0418, P0443, P0500-P0503, P1258, P1404, P1415 and P1416
not set, vehicle speed less than 85 mph at 400-3000 rpm
Possible Causes:
Air leaks in intake manifold, exhaust pipes or exhaust manifold
Fuel control sensor is out of calibration (ECT, IAT or MAF)
Low fuel pressure (fuel filter clogged, pressure regulator failure)
One or more injectors restricted or pressure regulator has failed
Trouble Code: P0174
/Fuel Trim System Lean (Bank 2)/
Trouble Code Conditions: DTC P0101-P0103, P0107-P0108, P0112-P0113,
P0117-P0118, P0121-P0125, P0200, P0300, P0335-P0336, P0351-P0358, P0405,
P0410, P0412, P0418, P0443, P0500-P0503, P1258, P1404, P1415 and P1416
not set, vehicle speed less than 85 mph at 400-3000 rpm, BARO sensor
Possible Causes:
Air leaks in intake manifold, exhaust pipes or exhaust manifold
Fuel control sensor is out of calibration (ECT, IAT or MAF)
Low fuel pressure (fuel filter clogged, pressure regulator failure)
One or more injectors restricted or pressure regulator has failed
Trouble Code: P0175
/Fuel Trim System Rich (Bank 2)/
Trouble Code Conditions: DTC P0101-P0103, P0107-P0108, P0112-P0113,
P0116-P0118, P0121-P0125, P0200, P0300, P0335-P0336, P0351-P0358, P0405,
P0410, P0412, P0418, P0443, P0500-P0503, P1258, P1404, P1415 and P1416
not set, engine started, vehicle driven at less than 85 mph at 400-3
Possible Causes:
Base engine "mechanical" fault affecting one or more cylinders
Excess fuel vapors in crankcase (the oil needs to be changed)
EVAP system component has failed or canister fuel saturated
Fuel control sensor is out of calibration (i.e., ECT, IAT or MAF)
Trouble Code: P0175
/Fuel Trim System Rich (Bank 2)/
Trouble Code Conditions: DTC P0101-P0103, P0107-P0108, P0112-P0113,
P0116-P0118, P0121-P0125, P0200, P0300, P0335-P0336, P0351-P0358, P0405,
P0410, P0412, P0418, P0443, P0500-P0503, P1258, P1404, P1415 and P1416
not set, engine started, vehicle driven at less than 85 mph at 400-3
Possible Causes:
Base engine "mechanical" fault affecting one or more cylinders
Excess fuel vapors in crankcase (the oil needs to be changed)
EVAP system component has failed or canister fuel saturated
Fuel control sensor is out of calibration (i.e., ECT, IAT or MAF)
Trouble Code: P0300
/Multiple Engine Misfire Detected/
Trouble Code Conditions: DTC P0101-P0103, P0116-P0118, P0121-P0123,
P0125, P0335, P0336, P0341-P0343, P0500-P0503 and P1258 not set, engine
speed from 450-3000 rpm, system voltage over 10.0v, ECT sensor from
19-230ºF, fuel level over 10%, TP angle steady ( 1%), ABS and Traction C
Possible Causes:
Base engine mechanical fault that affects one or more cylinders
Fuel metering fault that affects more than one cylinder
Fuel pressure too low or too high, fuel supply contaminated
EVAP system problem or the EVAP canister is fuel saturated
Trouble Code: P0300
/Multiple Engine Misfire Detected/
Trouble Code Conditions: DTC P0101-P0103, P0116-P0118, P0121-P0123,
P0125, P0335, P0336, P0341-P0343, P0500-P0503 and P1258 not set, engine
speed from 450-3000 rpm, system voltage over 10.0v, ECT sensor from
19-230ºF, fuel level over 10%, TP angle steady ( 1%), ABS and Traction C
Possible Causes:
Base engine mechanical fault that affects one or more cylinders
Fuel metering fault that affects more than one cylinder
Fuel pressure too low or too high, fuel supply contaminated
EVAP system problem or the EVAP canister is fuel saturated
Trouble Code: P0301
/Cylinder 1 Misfire Detected/
Trouble Code Conditions: DTC P0101, P0102, P0103, P0116, P0117, P0118,
P0121-P0123, P0125, P0335, P0336, P0341-P0343, P0500-P0503 and P1258 not
set, engine speed from 450-3000 rpm, system voltage over 10.0v, ECT
sensor from 19-230ºF, fuel level over 10%, TP angle steady ( 1%)
Possible Causes:
Air leak in the intake manifold, or in the EGR or PCV system
Base engine mechanical fault that affects only Cylinder 1
Fuel delivery component fault that affects only Cylinder 1 (i.e., a
contaminated, dirty or sticking fuel injector)
Ignition system faulty
Trouble Code: P0301
/Cylinder 1 Misfire Detected/
Trouble Code Conditions: DTC P0101, P0102, P0103, P0116, P0117, P0118,
P0121-P0123, P0125, P0335, P0336, P0341-P0343, P0500-P0503 and P1258 not
set, engine speed from 450-3000 rpm, system voltage over 10.0v, ECT
sensor from 19-230ºF, fuel level over 10%, TP angle steady ( 1%)
Possible Causes:
Air leak in the intake manifold, or in the EGR or PCV system
Base engine mechanical fault that affects only Cylinder 1
Fuel delivery component fault that affects only Cylinder 1 (i.e., a
contaminated, dirty or sticking fuel injector)
Ignition system faulty
Trouble Code: P0302
/Cylinder 2 Misfire Detected/
Trouble Code Conditions: DTC P0101, P0102, P0103, P0116, P0117, P0118,
P0121-P0123, P0125, P0335, P0336, P0341-P0343, P0500-P0503 and P1258 not
set, engine speed from 450-3000 rpm, system voltage over 10.0v, ECT
sensor from 19-230ºF, fuel level over 10%, TP angle steady ( 1%)
Possible Causes:
Air leak in the intake manifold, or in the EGR or PCV system
Base engine mechanical fault that affects only Cylinder 2
Fuel component fault that affects only Cylinder 2 (i.e., a dirty or
sticking fuel injector)
Ignition system fault (coil or plug)
Trouble Code: P0302
/Cylinder 2 Misfire Detected/
Trouble Code Conditions: DTC P0101, P0102, P0103, P0116, P0117, P0118,
P0121-P0123, P0125, P0335, P0336, P0341-P0343, P0500-P0503 and P1258 not
set, engine speed from 450-3000 rpm, system voltage over 10.0v, ECT
sensor from 19-230ºF, fuel level over 10%, TP angle steady ( 1%)
Possible Causes:
Air leak in the intake manifold, or in the EGR or PCV system
Base engine mechanical fault that affects only Cylinder 2
Fuel component fault that affects only Cylinder 2 (i.e., a dirty or
sticking fuel injector)
Ignition system fault (coil or plug)
Trouble Code: P0303
/Cylinder 3 Misfire Detected/
Trouble Code Conditions: DTC P0101, P0102, P0103, P0116, P0117, P0118,
P0121-P0123, P0125, P0335, P0336, P0341-P0343, P0500-P0503 and P1258 not
set, engine speed from 450-3000 rpm, system voltage over 10.0v, ECT
sensor from 19-230ºF, fuel level over 10%, TP angle steady ( 1%)
Possible Causes:
Air leak in the intake manifold, or in the EGR or PCV system
Base engine mechanical fault that affects only Cylinder 3
Fuel component fault that affects only Cylinder 3 (i.e., a dirty or
sticking fuel injector)
Ignition system fault (coil or plug)
Trouble Code: P0303
/Cylinder 3 Misfire Detected/
Trouble Code Conditions: DTC P0101, P0102, P0103, P0116, P0117, P0118,
P0121-P0123, P0125, P0335, P0336, P0341-P0343, P0500-P0503 and P1258 not
set, engine speed from 450-3000 rpm, system voltage over 10.0v, ECT
sensor from 19-230ºF, fuel level over 10%, TP angle steady ( 1%)
Possible Causes:
Air leak in the intake manifold, or in the EGR or PCV system
Base engine mechanical fault that affects only Cylinder 3
Fuel component fault that affects only Cylinder 3 (i.e., a dirty or
sticking fuel injector)
Ignition system fault (coil or plug)
Trouble Code: P0304
/Cylinder 4 Misfire Detected/
Trouble Code Conditions: DTC P0101, P0102, P0103, P0116, P0117, P0118,
P0121-P0123, P0125, P0335, P0336, P0341-P0343, P0500-P0503 and P1258 not
set, engine speed from 450-3000 rpm, system voltage over 10.0v, ECT
sensor from 19-230ºF, fuel level over 10%, TP angle steady ( 1%)
Possible Causes:
Air leak in the intake manifold, or in the EGR or PCV system
Base engine mechanical fault that affects only Cylinder 4
Fuel component fault that affects only Cylinder 4 (i.e., a dirty or
sticking fuel injector)
Ignition system fault (coil or plug)
Trouble Code: P0304
/Cylinder 4 Misfire Detected/
Trouble Code Conditions: DTC P0101, P0102, P0103, P0116, P0117, P0118,
P0121-P0123, P0125, P0335, P0336, P0341-P0343, P0500-P0503 and P1258 not
set, engine speed from 450-3000 rpm, system voltage over 10.0v, ECT
sensor from 19-230ºF, fuel level over 10%, TP angle steady ( 1%)
Possible Causes:
Air leak in the intake manifold, or in the EGR or PCV system
Base engine mechanical fault that affects only Cylinder 4
Fuel component fault that affects only Cylinder 4 (i.e., a dirty or
sticking fuel injector)
Ignition system fault (coil or plug)
Trouble Code: P0305
/Cylinder 5 Misfire Detected/
Trouble Code Conditions: DTC P0101, P0102, P0103, P0116, P0117, P0118,
P0121-P0123, P0125, P0335, P0336, P0341-P0343, P0500-P0503 and P1258 not
set, engine speed from 450-3000 rpm, system voltage over 10.0v, ECT
sensor from 19-230ºF, fuel level over 10%, TP angle steady ( 1%)
Possible Causes:
Air leak in the intake manifold, or in the EGR or PCV system
Base engine mechanical fault that affects only Cylinder 5
Fuel component fault that affects only Cylinder 5 (i.e., a dirty or
sticking fuel injector)
Ignition system fault (coil or plug)
Trouble Code: P0305
/Cylinder 5 Misfire Detected/
Trouble Code Conditions: DTC P0101, P0102, P0103, P0116, P0117, P0118,
P0121-P0123, P0125, P0335, P0336, P0341-P0343, P0500-P0503 and P1258 not
set, engine speed from 450-3000 rpm, system voltage over 10.0v, ECT
sensor from 19-230ºF, fuel level over 10%, TP angle steady ( 1%)
Possible Causes:
Air leak in the intake manifold, or in the EGR or PCV system
Base engine mechanical fault that affects only Cylinder 5
Fuel component fault that affects only Cylinder 5 (i.e., a dirty or
sticking fuel injector)
Ignition system fault (coil or plug)
Trouble Code: P0306
/Cylinder 6 Misfire Detected/
Trouble Code Conditions: DTC P0101, P0102, P0103, P0116, P0117, P0118,
P0121-P0123, P0125, P0335, P0336, P0341-P0343, P0500-P0503 and P1258 not
set, engine speed from 450-3000 rpm, system voltage over 10.0v, ECT
sensor from 19-230ºF, fuel level over 10%, TP angle steady ( 1%)
Possible Causes:
Air leak in the intake manifold, or in the EGR or PCV system
Base engine mechanical fault that affects only Cylinder 6
Fuel component fault that affects only Cylinder 6 (i.e., a dirty or
sticking fuel injector)
Ignition system fault (coil or plug)
Trouble Code: P0306
/Cylinder 6 Misfire Detected/
Trouble Code Conditions: DTC P0101, P0102, P0103, P0116, P0117, P0118,
P0121-P0123, P0125, P0335, P0336, P0341-P0343, P0500-P0503 and P1258 not
set, engine speed from 450-3000 rpm, system voltage over 10.0v, ECT
sensor from 19-230ºF, fuel level over 10%, TP angle steady ( 1%)
Possible Causes:
Air leak in the intake manifold, or in the EGR or PCV system
Base engine mechanical fault that affects only Cylinder 6
Fuel component fault that affects only Cylinder 6 (i.e., a dirty or
sticking fuel injector)
Ignition system fault (coil or plug)
Trouble Code: P0307
/Cylinder 7 Misfire Detected/
Trouble Code Conditions: DTC P0101, P0102, P0103, P0116, P0117, P0118,
P0121-P0123, P0125, P0335, P0336, P0341-P0343, P0500-P0503 and P1258 not
set, engine speed from 450-3000 rpm, system voltage over 10.0v, ECT
sensor from 19-230ºF, fuel level over 10%, TP angle steady ( 1%)
Possible Causes:
Air leak in the intake manifold, or in the EGR or PCV system
Base engine mechanical fault that affects only Cylinder 7
Fuel component fault that affects only Cylinder 7 (i.e., a dirty or
sticking fuel injector)
Ignition system fault (coil or plug)
Trouble Code: P0307
/Cylinder 7 Misfire Detected/
Trouble Code Conditions: DTC P0101, P0102, P0103, P0116, P0117, P0118,
P0121-P0123, P0125, P0335, P0336, P0341-P0343, P0500-P0503 and P1258 not
set, engine speed from 450-3000 rpm, system voltage over 10.0v, ECT
sensor from 19-230ºF, fuel level over 10%, TP angle steady ( 1%)
Possible Causes:
Air leak in the intake manifold, or in the EGR or PCV system
Base engine mechanical fault that affects only Cylinder 7
Fuel component fault that affects only Cylinder 7 (i.e., a dirty or
sticking fuel injector)
Ignition system fault (coil or plug)
Trouble Code: P0308
/Cylinder 8 Misfire Detected/
Trouble Code Conditions: DTC P0101, P0102, P0103, P0116, P0117, P0118,
P0121-P0123, P0125, P0335, P0336, P0341-P0343, P0500-P0503 and P1258 not
set, engine speed from 450-3000 rpm, system voltage over 10.0v, ECT
sensor from 19-230ºF, fuel level over 10%, TP angle steady ( 1%)
Possible Causes:
Air leak in the intake manifold, or in the EGR or PCV system
Base engine mechanical fault that affects only Cylinder 8
Fuel component fault that affects only Cylinder 8 (i.e., a dirty or
sticking fuel injector)
Ignition system fault (coil or plug)
Trouble Code: P0308
/Cylinder 8 Misfire Detected/
Trouble Code Conditions: DTC P0101, P0102, P0103, P0116, P0117, P0118,
P0121-P0123, P0125, P0335, P0336, P0341-P0343, P0500-P0503 and P1258 not
set, engine speed from 450-3000 rpm, system voltage over 10.0v, ECT
sensor from 19-230ºF, fuel level over 10%, TP angle steady ( 1%)
Possible Causes:
Air leak in the intake manifold, or in the EGR or PCV system
Base engine mechanical fault that affects only Cylinder 8
Fuel component fault that affects only Cylinder 8 (i.e., a dirty or
sticking fuel injector)
Ignition system fault (coil or plug)
Trouble Code: P0325
/Knock Sensor Range/Performance/
Trouble Code Conditions: DTC P0117, P0118, P0121, P0122, P0123, P0125,
P1114, P1115, P112 and P1122 not set, engine started, engine run-time
over 10 seconds, system voltage over 10.0v and the PCM detected an
unexpected voltage condition on the diagnostic circuit used during testing
Possible Causes:
Knock sensor signal circuit is open, shorted to ground or power
Knock sensor ground circuit is open (i.e., not mounted properly)
Knock sensor is damaged or has failed
On modules with an integrated sensor, clear the codes and retest for
codes.
Trouble Code: P0325
/Knock Sensor Range/Performance/
Trouble Code Conditions: DTC P0117, P0118, P0121, P0122, P0123, P0125,
P1114, P1115, P112 and P1122 not set, engine started, engine run-time
over 10 seconds, system voltage over 10.0v and the PCM detected an
unexpected voltage condition on the diagnostic circuit used during testing
Possible Causes:
Knock sensor signal circuit is open, shorted to ground or power
Knock sensor ground circuit is open (i.e., not mounted properly)
Knock sensor is damaged or has failed
On modules with an integrated sensor, clear the codes and retest for
codes.
Trouble Code: P0327
/Knock Sensor Circuit Malfunction (Bank 1)/
Trouble Code Conditions: DTC P0117, P0118, P0121-P0123, P0125, P1114,
P1115, P1120 and P1122 not set, engine started, engine speed from
475-975 for 10 seconds, system voltage from 10-18v, ECT sensor more than
140ºF, minimum noise level learned, then with the engine speed from 150
Possible Causes:
Knock sensor signal circuit is open, shorted to ground or power
Knock sensor ground circuit is open (check for proper torque)
Knock sensor is damaged or has failed
PCM has failed
Trouble Code: P0327
/Knock Sensor Circuit Malfunction (Bank 1)/
Trouble Code Conditions: DTC P0117, P0118, P0121-P0123, P0125, P1114,
P1115, P1120 and P1122 not set, engine started, engine speed from
475-975 for 10 seconds, system voltage from 10-18v, ECT sensor more than
140ºF, minimum noise level learned, then with the engine speed from 150
Possible Causes:
Knock sensor signal circuit is open, shorted to ground or power
Knock sensor ground circuit is open (check for proper torque)
Knock sensor is damaged or has failed
PCM has failed
Trouble Code: P0332
/Knock Sensor Circuit Malfunction (Bank 2)/
Trouble Code Conditions: DTC P0117, P0118, P0121-P0123, P0125, P1114,
P1115, P1120 and P1122 not set, engine started, engine speed from
475-975 for 10 seconds, system voltage from 10-18v, ECT sensor more than
140ºF, minimum noise level learned, then with the engine speed from 150
Possible Causes:
Knock sensor signal circuit is open, shorted to ground or power
Knock sensor ground circuit is open (check for proper torque)
Knock sensor is damaged or has failed
PCM has failed
TSB 02-06-04-023A contains a repair procedure for this code
Trouble Code: P0332
/Knock Sensor Circuit Malfunction (Bank 2)/
Trouble Code Conditions: DTC P0117, P0118, P0121-P0123, P0125, P1114,
P1115, P1120 and P1122 not set, engine started, engine speed from
475-975 for 10 seconds, system voltage from 10-18v, ECT sensor more than
140ºF, minimum noise level learned, then with the engine speed from 150
Possible Causes:
Knock sensor signal circuit is open, shorted to ground or power
Knock sensor ground circuit is open (check for proper torque)
Knock sensor is damaged or has failed
PCM has failed
TSB 02-06-04-023A contains a repair procedure for this code
Trouble Code: P0335
/Crankshaft Position Sensor Circuit Malfunction/
Trouble Code Conditions: DTC P0101, P0102, P0103, P0341, P0342 and P0343
not set, engine cranking, CMP sensor signals transitioning, MAF sensor
more than 3 g/sec, and the PCM did not detect any signals from the CKP
sensor (Hall Effect) for up 4-8 seconds during the CCM test.
Possible Causes:
CKP sensor signal circuit is open or shorted to ground
CKP sensor VREF circuit is open between the sensor and PCM
CKP sensor ground (Low Reference) circuit is open
CKP sensor is damaged or it failed (check crankshaft reluctor)
PCM has failed
Trouble Code: P0335
/Crankshaft Position Sensor Circuit Malfunction/
Trouble Code Conditions: DTC P0101, P0102, P0103, P0341, P0342 and P0343
not set, engine cranking, CMP sensor signals transitioning, MAF sensor
more than 3 g/sec, and the PCM did not detect any signals from the CKP
sensor (Hall Effect) for up 4-8 seconds during the CCM test.
Possible Causes:
CKP sensor signal circuit is open or shorted to ground
CKP sensor VREF circuit is open between the sensor and PCM
CKP sensor ground (Low Reference) circuit is open
CKP sensor is damaged or it failed (check crankshaft reluctor)
PCM has failed
Trouble Code: P0336
/Crankshaft Position Sensor Range/Performance/
Trouble Code Conditions: Engine cranking or running; and the PCM
detected the CKP sensor signal was out-of-range for 2 seconds during the
CCM test.
Possible Causes:
CKP sensor signal circuit has a high resistance condition
CKP sensor ground (Low Reference) circuit has high resistance
CKP sensor is damaged or it failed (check crankshaft reluctor)
PCM has failed
Vehicle have been driven while very low on fuel
Trouble Code: P0336
/Crankshaft Position Sensor Range/Performance/
Trouble Code Conditions: Engine cranking or running; and the PCM
detected the CKP sensor signal was out-of-range for 2 seconds during the
CCM test.
Possible Causes:
CKP sensor signal circuit has a high resistance condition
CKP sensor ground (Low Reference) circuit has high resistance
CKP sensor is damaged or it failed (check crankshaft reluctor)
PCM has failed
Vehicle have been driven while very low on fuel
Trouble Code: P0341
/CMP Sensor Signal Range/Performance/
Trouble Code Conditions: Engine started; at less than 4000 rpm, and the
PCM detected incorrect correlation between the CKP and CMP signals.
Possible Causes:
CMP sensor signal circuit is open, shorted to ground or VREF
CMP sensor signal wire is routed to close to the Generator, spark plug
wires or any other possible cause of EMI/RFI
CMP sensor is cracked, damaged or has failed
PCM has failed
TSB 02-06-04-0
Trouble Code: P0341
/CMP Sensor Signal Range/Performance/
Trouble Code Conditions: Engine started; at less than 4000 rpm, and the
PCM detected incorrect correlation between the CKP and CMP signals.
Possible Causes:
CMP sensor signal circuit is open, shorted to ground or VREF
CMP sensor signal wire is routed to close to the Generator, spark plug
wires or any other possible cause of EMI/RFI
CMP sensor is cracked, damaged or has failed
PCM has failed
TSB 02-06-04-0
Trouble Code: P0342
/CMP Sensor Circuit Low Input/
Trouble Code Conditions: Engine speed less than 4000 rpm and the PCM
detected the CMP sensor signal was in a low voltage state when it should
have been in a high voltage state for 1.5 seconds.
Possible Causes:
CMP sensor signal circuit is open, shorted to ground or VREF
Camshaft reluctor wheel is damaged or foreign material present
CMP sensor is contacting the reluctor wheel or is damaged
PCM has failed
Trouble Code: P0342
/CMP Sensor Circuit Low Input/
Trouble Code Conditions: Engine speed less than 4000 rpm and the PCM
detected the CMP sensor signal was in a low voltage state when it should
have been in a high voltage state for 1.5 seconds.
Possible Causes:
CMP sensor signal circuit is open, shorted to ground or VREF
Camshaft reluctor wheel is damaged or foreign material present
CMP sensor is contacting the reluctor wheel or is damaged
PCM has failed
Trouble Code: P0343
/CMP Sensor Circuit High Input/
Trouble Code Conditions: Engine started; at less than 4000 rpm, and the
PCM detected the CMP sensor signal was in a high voltage state when it
should have been in a low voltage state for 1.5 seconds.
Possible Causes:
CMP sensor signal circuit is open, shorted to ground or shorted to VREF
Camshaft reluctor wheel is damaged or foreign material present
CMP sensor is contacting the reluctor wheel or is damaged
PCM has failed
Trouble Code: P0343
/CMP Sensor Circuit High Input/
Trouble Code Conditions: Engine started; at less than 4000 rpm, and the
PCM detected the CMP sensor signal was in a high voltage state when it
should have been in a low voltage state for 1.5 seconds.
Possible Causes:
CMP sensor signal circuit is open, shorted to ground or shorted to VREF
Camshaft reluctor wheel is damaged or foreign material present
CMP sensor is contacting the reluctor wheel or is damaged
PCM has failed
Trouble Code: P0351
/Ignition Coil 1 Control Circuit Malfunction/
Trouble Code Conditions: Engine started; and the PCM detected an
unexpected low or high voltage condition on Coil On Plug (COP) Ignition
Control circuit for less than one second during the CCM test. Note:
Watch the Scan Tool Misfire Counters to identify the fault.
Possible Causes:
IC circuit is open, shorted to ground or shorted to power
Ignition coil (COP) is damaged or has failed
PCM has failed
Trouble Code: P0351
/Ignition Coil 1 Control Circuit Malfunction/
Trouble Code Conditions: Engine started; and the PCM detected an
unexpected low or high voltage condition on Coil On Plug (COP) Ignition
Control circuit for less than one second during the CCM test. Note:
Watch the Scan Tool Misfire Counters to identify the fault.
Possible Causes:
IC circuit is open, shorted to ground or shorted to power
Ignition coil (COP) is damaged or has failed
PCM has failed
Trouble Code: P0352
/Ignition Coil 2 Control Circuit Malfunction/
Trouble Code Conditions: Engine started; and the PCM detected an
unexpected low or high voltage condition on Coil On Plug (COP) Ignition
Control circuit for less than one second during the CCM test. Note:
Watch the Scan Tool Misfire Counters to identify the fault.
Possible Causes:
IC circuit is open, shorted to ground or shorted to power
Ignition coil (COP) is damaged or has failed
PCM has failed
Trouble Code: P0352
/Ignition Coil 2 Control Circuit Malfunction/
Trouble Code Conditions: Engine started; and the PCM detected an
unexpected low or high voltage condition on Coil On Plug (COP) Ignition
Control circuit for less than one second during the CCM test. Note:
Watch the Scan Tool Misfire Counters to identify the fault.
Possible Causes:
IC circuit is open, shorted to ground or shorted to power
Ignition coil (COP) is damaged or has failed
PCM has failed
Trouble Code: P0353
/Ignition Coil 3 Control Circuit Malfunction/
Trouble Code Conditions: Engine started; and the PCM detected an
unexpected low or high voltage condition on Coil On Plug (COP) Ignition
Control circuit for less than one second during the CCM test. Note:
Watch the Scan Tool Misfire Counters to identify the fault.
Possible Causes:
IC circuit is open, shorted to ground or shorted to power between the
coil and the PCM
Ignition coil (COP) is damaged or has failed
PCM has failed
Trouble Code: P0353
/Ignition Coil 3 Control Circuit Malfunction/
Trouble Code Conditions: Engine started; and the PCM detected an
unexpected low or high voltage condition on Coil On Plug (COP) Ignition
Control circuit for less than one second during the CCM test. Note:
Watch the Scan Tool Misfire Counters to identify the fault.
Possible Causes:
IC circuit is open, shorted to ground or shorted to power between the
coil and the PCM
Ignition coil (COP) is damaged or has failed
PCM has failed
Trouble Code: P0354
/Ignition Coil 4 Control Circuit Malfunction/
Trouble Code Conditions: Engine started; and the PCM detected an
unexpected low or high voltage condition on Coil On Plug (COP) Ignition
Control circuit for less than one second during the CCM test. Note:
Watch the Scan Tool Misfire Counters to identify the fault.
Possible Causes:
IC circuit is open, shorted to ground or shorted to power between the
coil and the PCM
Ignition coil (COP) is damaged or has failed, or the PCM has failed
Trouble Code: P0354
/Ignition Coil 4 Control Circuit Malfunction/
Trouble Code Conditions: Engine started; and the PCM detected an
unexpected low or high voltage condition on Coil On Plug (COP) Ignition
Control circuit for less than one second during the CCM test. Note:
Watch the Scan Tool Misfire Counters to identify the fault.
Possible Causes:
IC circuit is open, shorted to ground or shorted to power between the
coil and the PCM
Ignition coil (COP) is damaged or has failed, or the PCM has failed
Trouble Code: P0355
/Ignition Coil 5 Control Circuit Malfunction/
Trouble Code Conditions: Engine started; and the PCM detected an
unexpected low or high voltage condition on Coil On Plug (COP) Ignition
Control circuit for less than one second during the CCM test. Note:
Watch the Scan Tool Misfire Counters to identify the fault.
Possible Causes:
IC circuit is open, shorted to ground or shorted to power between the
coil and the PCM
Ignition coil (COP) is damaged or has failed
PCM has failed
Trouble Code: P0355
/Ignition Coil 5 Control Circuit Malfunction/
Trouble Code Conditions: Engine started; and the PCM detected an
unexpected low or high voltage condition on Coil On Plug (COP) Ignition
Control circuit for less than one second during the CCM test. Note:
Watch the Scan Tool Misfire Counters to identify the fault.
Possible Causes:
IC circuit is open, shorted to ground or shorted to power between the
coil and the PCM
Ignition coil (COP) is damaged or has failed
PCM has failed
Trouble Code: P0356
/Ignition Coil 6 Control Circuit Malfunction/
Trouble Code Conditions: Engine started; and the PCM detected an
unexpected low or high voltage condition on Coil On Plug (COP) Ignition
Control circuit for less than one second during the CCM test. Note:
Watch the Scan Tool Misfire Counters to identify the fault.
Possible Causes:
IC circuit is open, shorted to ground or shorted to power between the
coil and the PCM
Ignition coil (COP) is damaged or has failed
PCM has failed
Trouble Code: P0356
/Ignition Coil 6 Control Circuit Malfunction/
Trouble Code Conditions: Engine started; and the PCM detected an
unexpected low or high voltage condition on Coil On Plug (COP) Ignition
Control circuit for less than one second during the CCM test. Note:
Watch the Scan Tool Misfire Counters to identify the fault.
Possible Causes:
IC circuit is open, shorted to ground or shorted to power between the
coil and the PCM
Ignition coil (COP) is damaged or has failed
PCM has failed
Trouble Code: P0357
/Ignition Coil 7 Control Circuit Malfunction/
Trouble Code Conditions: Engine started; and the PCM detected an
unexpected low or high voltage condition on Coil On Plug (COP) Ignition
Control circuit for less than one second during the CCM test. Note:
Watch the Scan Tool Misfire Counters to identify the fault.
Possible Causes:
IC circuit is open, shorted to ground or shorted to power between the
coil and the PCM
Ignition coil (COP) is damaged or has failed
PCM has failed
Trouble Code: P0357
/Ignition Coil 7 Control Circuit Malfunction/
Trouble Code Conditions: Engine started; and the PCM detected an
unexpected low or high voltage condition on Coil On Plug (COP) Ignition
Control circuit for less than one second during the CCM test. Note:
Watch the Scan Tool Misfire Counters to identify the fault.
Possible Causes:
IC circuit is open, shorted to ground or shorted to power between the
coil and the PCM
Ignition coil (COP) is damaged or has failed
PCM has failed
Trouble Code: P0358
/Ignition Coil 8 Control Circuit Malfunction/
Trouble Code Conditions: Engine started; and the PCM detected an
unexpected low or high voltage condition on Coil On Plug (COP) Ignition
Control circuit for less than one second during the CCM test. Note:
Watch the Scan Tool Misfire Counters to identify the fault.
Possible Causes:
IC circuit is open, shorted to ground or shorted to power between the
coil and the PCM
Ignition coil (COP) is damaged or has failed
PCM has failed
Trouble Code: P0358
/Ignition Coil 8 Control Circuit Malfunction/
Trouble Code Conditions: Engine started; and the PCM detected an
unexpected low or high voltage condition on Coil On Plug (COP) Ignition
Control circuit for less than one second during the CCM test. Note:
Watch the Scan Tool Misfire Counters to identify the fault.
Possible Causes:
IC circuit is open, shorted to ground or shorted to power between the
coil and the PCM
Ignition coil (COP) is damaged or has failed
PCM has failed
Trouble Code: P0401
/Insufficient EGR Flow Detected/
Trouble Code Conditions: DTC P0101, P0102, P0103, P0107, P0108, P0112,
P0113, P0117, P0118, P0121, P0122, P0123, P0405, P0500, P0502, P0503,
P0562, P0563 and P1404 not set, engine started, ECT sensor from
140-243ºF, IAT sensor less than 140ºF, engine vacuum from 60-83 kPa (BARO v
Possible Causes:
Base engine problem (e.g., a severely restricted exhaust), or any other
problem that causes the engine to run poorly
EGR passages or intake passages clogged or restricted
EGR pipe is clogged, dirty or otherwise restricted
EGR vacuum hoses damaged, loose
Trouble Code: P0401
/Insufficient EGR Flow Detected/
Trouble Code Conditions: DTC P0101, P0102, P0103, P0107, P0108, P0112,
P0113, P0117, P0118, P0121, P0122, P0123, P0405, P0500, P0502, P0503,
P0562, P0563 and P1404 not set, engine started, ECT sensor from
140-243ºF, IAT sensor less than 140ºF, engine vacuum from 60-83 kPa (BARO v
Possible Causes:
Base engine problem (e.g., a severely restricted exhaust), or any other
problem that causes the engine to run poorly
EGR passages or intake passages clogged or restricted
EGR pipe is clogged, dirty or otherwise restricted
EGR vacuum hoses damaged, loose
Trouble Code: P0404
/EGR Open Position Signal Range/Performance/
Trouble Code Conditions: Engine started; system voltage over 11.7v,
Desired EGR position over 0%, and the PCM detected more than a 20%
difference between the Actual and Desired EGR position with the EGR
failure counter more than a calibrated value.
Possible Causes:
EGR sensor signal circuit is open, shorted to ground or power
EGR sensor ground or VREF circuit is open
EGR valve seat or pintle contains debris or carbon (inspect and clean)
EGR valve is contaminated, clogged, damaged or has failed
PCM has failed
Trouble Code: P0404
/EGR Open Position Signal Range/Performance/
Trouble Code Conditions: Engine started; system voltage over 11.7v,
Desired EGR position over 0%, and the PCM detected more than a 20%
difference between the Actual and Desired EGR position with the EGR
failure counter more than a calibrated value.
Possible Causes:
EGR sensor signal circuit is open, shorted to ground or power
EGR sensor ground or VREF circuit is open
EGR valve seat or pintle contains debris or carbon (inspect and clean)
EGR valve is contaminated, clogged, damaged or has failed
PCM has failed
Trouble Code: P0405
EGR Sensor Circuit Low Input/
Trouble Code Conditions: Engine started; system voltage over 10.0v and
the PCM detected the EGR Feedback signal was less than 0.14v for 10
seconds. An EGR system is used to lower Oxides of Nitrogen (NOx)
emission levels.
Possible Causes:
EGR position sensor signal circuit is open or shorted to ground
EGR position sensor VREF circuit is open or shorted to ground
EGR position sensor is damaged or has failed
PCM has failed
Trouble Code: P0405
/EGR Sensor Circuit Low Input/
Trouble Code Conditions: Engine started; system voltage over 10.0v and
the PCM detected the EGR Feedback signal was less than 0.14v for 10
seconds. An EGR system is used to lower Oxides of Nitrogen (NOx)
emission levels.
Possible Causes:
EGR position sensor signal circuit is open or shorted to ground
EGR position sensor VREF circuit is open or shorted to ground
EGR position sensor is damaged or has failed
PCM has failed
Trouble Code: P0410
Secondary AIR System Performance/
Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112-P0118,
P0125, P0171-P0175, P0200, P0300, P0335, P0336, P0351-P0358, P0440,
P0442-P0449, P1120, P1220, P1221, P1258 and P1441 not set, fuel level at
12.5-87.5%, engine started, ECT sensor from 14-230ºF
Possible Causes:
AIR solenoid power circuit is open (check the U/H IGN fuse)
AIR pump is damaged or has failed (inspect air pump for water)
AIR system check valves and/or pipes are damaged or leaking
AIR system hoses or lines are damaged, pinched or kinked
Base engine
Trouble Code: P0410
/Secondary AIR System Performance/
Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112-P0118,
P0125, P0171-P0175, P0200, P0300, P0335, P0336, P0351-P0358, P0440,
P0442-P0449, P1120, P1220, P1221, P1258 and P1441 not set, fuel level at
12.5-87.5%, engine started, ECT sensor from 14-230ºF
Possible Causes:
AIR solenoid power circuit is open (check the U/H IGN fuse)
AIR pump is damaged or has failed (inspect air pump for water)
AIR system check valves and/or pipes are damaged or leaking
AIR system hoses or lines are damaged, pinched or kinked
Base engine
Trouble Code: P0412
/Secondary Air System Solenoid Control Circuit Malfunction/
Trouble Code Conditions: Engine started; system voltage over 10.0v and
the PCM detected that the Actual and Commanded state of the AIR solenoid
driver did not match for 5 seconds during the test.
Possible Causes:
AIR solenoid control circuit is open, shorted to ground or power
AIR solenoid control circuit is shorted to system power (B+)
AIR solenoid power circuit is open (test power from IGN1 fuse)
AIR solenoid is damaged or has failed
PCM has failed
Trouble Code: P0412
/Secondary Air System Solenoid Control Circuit Malfunction/
Trouble Code Conditions: Engine started; system voltage over 10.0v and
the PCM detected that the Actual and Commanded state of the AIR solenoid
driver did not match for 5 seconds during the test.
Possible Causes:
AIR solenoid control circuit is open, shorted to ground or power
AIR solenoid control circuit is shorted to system power (B+)
AIR solenoid power circuit is open (test power from IGN1 fuse)
AIR solenoid is damaged or has failed
PCM has failed
Trouble Code: P0418
/Secondary Air System Pump Relay Control Circuit Malfunction (Bank 1)/
Trouble Code Conditions: Engine started; system voltage over 10.0v and
the PCM detected the Actual and Commanded state of the Secondary Air
Pump Relay driver did not match for 5 seconds.
Possible Causes:
AIR relay control circuit is open, shorted to ground or power
AIR relay control circuit is shorted to system power (B+)
AIR relay power circuit is open (test power from IGN fuse)
AIR relay is damaged or has failed
PCM has failed
Trouble Code: P0418
/Secondary Air System Pump Relay Control Circuit Malfunction (Bank 1)/
Trouble Code Conditions: Engine started; system voltage over 10.0v and
the PCM detected the Actual and Commanded state of the Secondary Air
Pump Relay driver did not match for 5 seconds.
Possible Causes:
AIR relay control circuit is open, shorted to ground or power
AIR relay control circuit is shorted to system power (B+)
AIR relay power circuit is open (test power from IGN fuse)
AIR relay is damaged or has failed
PCM has failed
Trouble Code: P0420
/Catalyst System Low Efficiency (Bank 1)/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0118,
P0128, P0131-P0137, P0140, P0141, P0151-P0158, P0160, P0161,
P0171-P0175, P0200, P0300, P0335, P0336, P0341-P0343, P0351-P0358,
P0410, P0440, P0502-P0503, P0506-P0507, P0606, P1120, P1133, P1134,
P1153, P1154, P1
Possible Causes:
Air leaks at the exhaust manifold or in the exhaust pipes
Base engine problems (i.e., high engine oil or coolant usage)
Catalytic converter is damaged, contaminated or has failed
Continuous engine misfire conditions, or weak or low coil output
Trouble Code: P0420
/Catalyst System Low Efficiency (Bank 1)/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0118,
P0128, P0131-P0137, P0140, P0141, P0151-P0158, P0160, P0161,
P0171-P0175, P0200, P0300, P0335, P0336, P0341-P0343, P0351-P0358,
P0410, P0440, P0502-P0503, P0506-P0507, P0606, P1120, P1133, P1134,
P1153, P1154, P1
Possible Causes:
Air leaks at the exhaust manifold or in the exhaust pipes
Base engine problems (i.e., high engine oil or coolant usage)
Catalytic converter is damaged, contaminated or has failed
Continuous engine misfire conditions, or weak or low coil output
Trouble Code: P0430
/Catalyst System Low Efficiency (Bank 2)/
Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112-P0118,
P0121-P0123, P0125, P0171-P0175, P0200, P0230, P0300, P0325-P0327,
P0332-P0336, P0341-P0343, P0351-P0358, P0401-P0405, P0410, P0412, P0418,
P0440-P0449, P0500, P0704, P0801-0803, P1258, P1336, P1404, P1415, P141
Possible Causes:
Air leaks at the exhaust manifold or in the exhaust pipes
Base engine problems (i.e., high engine oil or coolant usage)
Catalytic converter is damaged, contaminated or has failed
Continuous engine misfire conditions, or weak or low coil output
Trouble Code: P0430
/Catalyst System Low Efficiency (Bank 2)/
Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112-P0118,
P0121-P0123, P0125, P0171-P0175, P0200, P0230, P0300, P0325-P0327,
P0332-P0336, P0341-P0343, P0351-P0358, P0401-P0405, P0410, P0412, P0418,
P0440-P0449, P0500, P0704, P0801-0803, P1258, P1336, P1404, P1415, P141
Possible Causes:
Air leaks at the exhaust manifold or in the exhaust pipes
Base engine problems (i.e., high engine oil or coolant usage)
Catalytic converter is damaged, contaminated or has failed
Continuous engine misfire conditions, or weak or low coil output
Trouble Code: P0440
/EVAP System Malfunction/
Trouble Code Conditions: DTC P0107, P0108, P0112, P0113, P0116-P0118,
P0121-P0123, P0125, P0131-P0141, P0443, P0449, P0452, P0453,
P1111-P1115, P1121 and P1122 not set, engine started, vehicle driven at
a steady speed of less than 75 mph, system voltage over 10.0v,
Possible Causes:
Charcoal canister is loaded with fuel or moisture
Fuel filler cap is loose, cross-threaded, damaged or wrong part
Fuel tank, fuel filler neck or fuel sending unit 'O' ring is leaking
Fuel tank pressure sensor is damaged, disconnected or it failed
Fuel
Trouble Code: P0440
/EVAP System Malfunction/
Trouble Code Conditions: DTC P0107, P0108, P0112, P0113, P0116-P0118,
P0121-P0123, P0125, P0131-P0141, P0443, P0449, P0452, P0453,
P1111-P1115, P1121 and P1122 not set, engine started, vehicle driven at
a steady speed of less than 75 mph, system voltage over 10.0v
Possible Causes:
Charcoal canister is loaded with fuel or moisture
Fuel filler cap is loose, cross-threaded, damaged or wrong part
Fuel tank, fuel filler neck or fuel sending unit 'O' ring is leaking
Fuel tank pressure sensor is damaged, disconnected or it failed
Fuel
Trouble Code: P0442
/EVAP System Small Leak (0.040") Detected/
Trouble Code Conditions: DTC P0107, P0108, P0112-P0118, P0121-P0123,
P0125, P0443, P0449, P0452, P0453, P1111-P1115, P1121 and P1122 not set,
engine started, ECT and IAT sensors from 39-86ºF and within 16ºF at
start-up, BARO sensor over 75 kPa, system voltage over 10.0v
Possible Causes:
Charcoal canister is loaded with fuel or moisture
Fuel filler cap is loose, cross-threaded, damaged or wrong part
Fuel tank, fuel filler neck or fuel sending unit 'O' ring is leaking
Fuel tank pressure sensor is damaged, disconnected or it failed
Fuel
Trouble Code: P0442
/EVAP System Small Leak (0.040") Detected/
Trouble Code Conditions: DTC P0107, P0108, P0112-P0118, P0121-P0123,
P0125, P0443, P0449, P0452, P0453, P1111-P1115, P1121 and P1122 not set,
engine started, ECT and IAT sensors from 39-86ºF and within 16ºF at
start-up, BARO sensor over 75 kPa, system voltage over 10.0v
Possible Causes:
Charcoal canister is loaded with fuel or moisture
Fuel filler cap is loose, cross-threaded, damaged or wrong part
Fuel tank, fuel filler neck or fuel sending unit 'O' ring is leaking
Fuel tank pressure sensor is damaged, disconnected or it failed
Fuel
Trouble Code: P0442
/EVAP System Small Leak (0.040") Detected/
Trouble Code Conditions: DTC P0107, P0108, P0112, P0113, P0116-P0118,
P0125, P0131-P0141, P0151-P0161, P0443, P0449, P0452, P0453, P1106,
P1107, P1111, P1112, P1114, P1115, P1120, P1220 and P1221 not set,
engine started, ECT and IAT sensors from 39-86ºF and within 16ºF at start-up
Possible Causes:
Charcoal canister is loaded with fuel or moisture
Fuel filler cap is loose, cross-threaded, damaged or wrong part
Fuel tank, fuel filler neck or fuel sending unit 'O' ring is leaking
Fuel tank pressure sensor is damaged, disconnected or it failed
Fuel
Trouble Code: P0442
/EVAP System Small Leak (0.040") Detected/
Trouble Code Conditions: DTC P0107, P0108, P0112, P0113, P0116-P0118,
P0125, P0131-P0141, P0151-P0161, P0443, P0449, P0452, P0453, P1106,
P1107, P1111, P1112, P1114, P1115, P1120, P1220 and P1221 not set,
engine started, ECT and IAT sensors from 39-86ºF and within 16ºF at start-up
Possible Causes:
Charcoal canister is loaded with fuel or moisture
Fuel filler cap is loose, cross-threaded, damaged or wrong part
Fuel tank, fuel filler neck or fuel sending unit 'O' ring is leaking
Fuel tank pressure sensor is damaged, disconnected or it failed
Fuel
Trouble Code: P0443
/EVAP Purge Solenoid Control Circuit Malfunction/
Trouble Code Conditions: Engine started; system voltage over 10.0v and
the PCM detected the Commanded and Actual state of the Purge Solenoid
driver control circuit did not match for over 5 seconds.
Possible Causes:
Purge solenoid control circuit is open or shorted to ground
Purge solenoid control circuit is shorted to system power (B+)
Purge solenoid power circuit is open (test ENG CTRL fuse)
Purge solenoid is damaged or has failed
PCM has failed
Trouble Code: P0443
/EVAP Purge Solenoid Control Circuit Malfunction/
Trouble Code Conditions: Engine started; system voltage over 10.0v and
the PCM detected the Commanded and Actual state of the Purge Solenoid
driver control circuit did not match for over 5 seconds.
Possible Causes:
Purge solenoid control circuit is open or shorted to ground
Purge solenoid control circuit is shorted to system power (B+)
Purge solenoid power circuit is open (test ENG CTRL fuse)
Purge solenoid is damaged or has failed
PCM has failed
Trouble Code: P0446
/EVAP Vent System Performance/
Trouble Code Conditions: DTC P0107. P0108, P0112, P0113, P0116, P0117,
P0118, P0121, P0122, P0123, P0125, P0440, P0442, P0443, P0449, P0452,
P0453, P1111, P1112, P1114, P1115, P1121, and P1122 not set, engine
started, ECT and IAT sensors from 39-86ºF and within 16ºF at start-up, s
Possible Causes:
EVAP vent fresh air hose is clogged, kinked or restricted
EVAP Vent solenoid is contaminated, damaged or has failed
FTP sensor is out-of-calibration, damaged or "skewed"
PCM has failed
Trouble Code: P0446
/EVAP Vent System Performance/
Trouble Code Conditions: DTC P0107. P0108, P0112, P0113, P0116, P0117,
P0118, P0121, P0122, P0123, P0125, P0440, P0442, P0443, P0449, P0452,
P0453, P1111, P1112, P1114, P1115, P1121, and P1122 not set, engine
started, ECT and IAT sensors from 39-86ºF and within 16ºF at start-up, s
Possible Causes:
EVAP vent fresh air hose is clogged, kinked or restricted
EVAP Vent solenoid is contaminated, damaged or has failed
FTP sensor is out-of-calibration, damaged or "skewed"
PCM has failed
Trouble Code: P0449
/EVAP Vent Solenoid Control Circuit Malfunction/
Trouble Code Conditions: Engine started; system voltage over 10.0v and
the PCM detected the Commanded and Actual state of the Vent Solenoid
driver control circuit did not match for over 5 seconds.
Possible Causes:
Vent solenoid control circuit is open, shorted to ground or B+
Vent solenoid power circuit is open (test the ENG CTRL fuse)
Vent solenoid is damaged or has failed
PCM has failed
Trouble Code: P0449
/EVAP Vent Solenoid Control Circuit Malfunction/
Trouble Code Conditions: Engine started; system voltage over 10.0v and
the PCM detected the Commanded and Actual state of the Vent Solenoid
driver control circuit did not match for over 5 seconds.
Possible Causes:
Vent solenoid control circuit is open, shorted to ground or B+
Vent solenoid power circuit is open (test the ENG CTRL fuse)
Vent solenoid is damaged or has failed
PCM has failed
Trouble Code: P0452
/Fuel Tank Pressure Sensor Circuit Low Input/
Trouble Code Conditions: Key on or engine running; and the PCM detected
the Fuel Tank Pressure (FTP) sensor circuit was less than 0.1v for 5
seconds.
Possible Causes:
FTP sensor signal circuit is open or shorted to ground
FTP sensor VREF circuit is open or shorted to ground
FTP sensor is damaged or has failed
Trouble Code: P0452
/Fuel Tank Pressure Sensor Circuit Low Input/
Trouble Code Conditions: Key on or engine running; and the PCM detected
the Fuel Tank Pressure (FTP) sensor circuit was less than 0.1v for 5
seconds.
Possible Causes:
FTP sensor signal circuit is open or shorted to ground
FTP sensor VREF circuit is open or shorted to ground
FTP sensor is damaged or has failed
PCM has failed
Trouble Code: P0453
/Fuel Tank Pressure Sensor Circuit High Input/
Trouble Code Conditions: Key on or engine running; and the PCM detected
an unexpected "high" voltage condition (more than 4.90v) on the Fuel
Tank Pressure sensor signal circuit for 5 seconds in the test.
Possible Causes:
FTP sensor signal circuit is shorted to VREF or system power
FTP sensor ground circuit is open between sensor and PCM
FTP sensor is damaged or has failed
PCM has failed
Trouble Code: P0453
/Fuel Tank Pressure Sensor Circuit High Input/
Trouble Code Conditions: Key on or engine running; and the PCM detected
an unexpected "high" voltage condition (more than 4.90v) on the Fuel
Tank Pressure sensor signal circuit for 5 seconds in the test.
Possible Causes:
FTP sensor signal circuit is shorted to VREF or system power
FTP sensor ground circuit is open between sensor and PCM
FTP sensor is damaged or has failed
PCM has failed
Trouble Code: P0461
/Fuel Level Sensor Signal Range/Performance/
Trouble Code Conditions: Engine started; Fuel Level Sensor indicating
over 9.1 gallons (34.4 liters) of fuel present, then the vehicle driven
for 150 accumulated miles, and the PCM detected the fuel tank level did
not decrease by at least 3/4 gallon (3 liters) under these conditi
Possible Causes:
Fuel level sensor signal circuit is open or shorted to ground between
the fuel level sensor and the PCM connector
Fuel level sensor ground circuit is open or has high resistance
Fuel level sender is damaged, binding or not aligned properly
I
Trouble Code: P0461
/Fuel Level Sensor Signal Range/Performance/
Trouble Code Conditions: Engine started; Fuel Level Sensor indicating
over 9.1 gallons (34.4 liters) of fuel present, then the vehicle driven
for 150 accumulated miles, and the PCM detected the fuel tank level did
not decrease by at least 3/4 gallon (3 liters) under these condition
Possible Causes:
Fuel level sensor signal circuit is open or shorted to ground between
the fuel level sensor and the PCM connector
Fuel level sensor ground circuit is open or has high resistance
Fuel level sender is damaged, binding or not aligned properly
Trouble Code: P0462
/Fuel Level Sensor Low Input/
Trouble Code Conditions: DTC P0601 not set; engine running, system
voltage over 10.0v and the PCM detected the Fuel Level sensor signal
indicated less than 0.39v for over 6 minutes during the CCM test.
Possible Causes:
Fuel level sensor signal circuit is shorted to ground between the fuel
level sensor and the PCM connector
Fuel level sender is damaged, binding or not aligned properly
Instrument cluster or the PCM has failed
TSB 01-06-04-025 contains a repair procedure
Trouble Code: P0462
/Fuel Level Sensor Low Input/
Trouble Code Conditions: DTC P0601 not set; engine running, system
voltage over 10.0v and the PCM detected the Fuel Level sensor signal
indicated less than 0.39v for over 6 minutes during the CCM test.
Possible Causes:
Fuel level sensor signal circuit is shorted to ground between the fuel
level sensor and the PCM connector
Fuel level sender is damaged, binding or not aligned properly
Instrument cluster or the PCM has failed
TSB 01-06-04-025 contains a repair procedure
Trouble Code: P0463
/Fuel Level Sensor High Input/
Trouble Code Conditions: Engine started; system voltage over 10.0v and
the PCM detected the Fuel Level sensor signal indicated more than 2.90v
for 6 minutes under these conditions during the CCM test.
Possible Causes:
Fuel level sensor signal circuit is shorted to system power
Fuel level sensor ground circuit is open
Fuel level sender is damaged, binding or not aligned properly
PCM has failed
Trouble Code: P0463
/Fuel Level Sensor High Input/
Trouble Code Conditions: Engine started; system voltage over 10.0v and
the PCM detected the Fuel Level sensor signal indicated more than 2.90v
for 6 minutes under these conditions during the CCM test.
Possible Causes:
Fuel level sensor signal circuit is shorted to system power
Fuel level sensor ground circuit is open
Fuel level sender is damaged, binding or not aligned properly
PCM has failed
Trouble Code: P0480
/Cooling Fan Relay 1 Control Circuit Malfunction/
Trouble Code Conditions: Engine started; system voltage over 10.0v and
the PCM detected the Commanded state and Actual state of the Fan Relay 1
control circuit (Low Speed Fan) did not match for 5 seconds.
Possible Causes:
Fan control relay control circuit is open or shorted to ground
Fan control relay control circuit is shorted to system power
Fan control relay power circuit is open (check Cool Fan 1 fuse)
Fan control relay is damaged or has failed
PCM has failed
Trouble Code: P0480
/Cooling Fan Relay 1 Control Circuit Malfunction/
Trouble Code Conditions: Engine started; system voltage over 10.0v and
the PCM detected the Commanded state and Actual state of the Fan Relay 1
control circuit (Low Speed Fan) did not match for 5 seconds.
Possible Causes:
Fan control relay control circuit is open or shorted to ground
Fan control relay control circuit is shorted to system power
Fan control relay power circuit is open (check Cool Fan 1 fuse)
Fan control relay is damaged or has failed
PCM has failed
Trouble Code: P0481
/Cooling Fan Relay 2-3 Control Circuit Malfunction/
Trouble Code Conditions: Engine started; system voltage over 10.0v and
the PCM detected the Actual state and the Commanded state of the Cooling
Fan Relay 2-3 control circuit did not match for 10 seconds.
Possible Causes:
Fan control relay control circuit is open or shorted to ground
Fan control relay control circuit is shorted to system power
Fan control relay power circuit is open or shorted to ground
Fan control relay is damaged or has failed
PCM has failed
Trouble Code: P0481
/Cooling Fan Relay 2-3 Control Circuit Malfunction/
Trouble Code Conditions: Engine started; system voltage over 10.0v and
the PCM detected the Actual state and the Commanded state of the Cooling
Fan Relay 2-3 control circuit did not match for 10 seconds.
Possible Causes:
Fan control relay control circuit is open or shorted to ground
Fan control relay control circuit is shorted to system power
Fan control relay power circuit is open or shorted to ground
Fan control relay is damaged or has failed
PCM has failed
Trouble Code: P0500
/Vehicle Speed Sensor Circuit Malfunction/
Trouble Code Conditions: DTC P0107, P0108, P0117, P0118, P0121, P0122,
P0123, P0125, P0506 and P0507 not set, vehicle driven to a speed over
1000 rpm, ECT sensor more than 95ºF, MAP sensor from 40-100 kPa with the
A/C "off" or between 45-100 kPa with the A/C "on", TP angle from 5
Possible Causes:
Output shaft rotor is chipped or damaged
Output shaft rotor is not aligned properly with the VSS unit
VSS tip contains debris or metal shavings (an intermittent fault)
VSS positive (+) signal circuit is open or shorted to ground
VSS negative (-) signal circuit is open
Trouble Code: P0500
/Vehicle Speed Sensor Circuit Malfunction/
Trouble Code Conditions: DTC P0107, P0108, P0117, P0118, P0121, P0122,
P0123, P0125, P0506 and P0507 not set, vehicle driven to a speed over
1000 rpm, ECT sensor more than 95ºF, MAP sensor from 40-100 kPa with the
A/C "off" or between 45-100 kPa with the A/C "on", TP angle from 5
Possible Causes:
Output shaft rotor is chipped or damaged
Output shaft rotor is not aligned properly with the VSS unit
VSS tip contains debris or metal shavings (an intermittent fault)
VSS positive (+) signal circuit is open or shorted to ground
VSS negative (-) signal circuit is open
Trouble Code: P0506
/Idle Speed Too Low/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0118,
P0121-P0123, P0125, P0128, P0171-P0175, P0200, P0300, P0440-P0449,
P1111-P1115, P1121, P1122, P1380, P1381 and P1441 not set, engine
started, engine run-time over 1 minute, ECT sensor from 140-241ºF
Possible Causes:
Air inlet duct is collapsed, loose or air filter element is clogged
Base engine problem (i.e., compression or misfire condition)
IAC valve is damaged or has failed
Idle air inlet passage or throttle bore is dirty or full of deposits
MAF sensor is dirty
Trouble Code: P0506
/Idle Speed Too Low/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0118,
P0121-P0123, P0125, P0128, P0171-P0175, P0200, P0300, P0440-P0449,
P1111-P1115, P1121, P1122, P1380, P1381 and P1441 not set, engine
started, engine run-time over 1 minute, ECT sensor from 140-241ºF
Possible Causes:
Air inlet duct is collapsed, loose or air filter element is clogged
Base engine problem (i.e., compression or misfire condition)
IAC valve is damaged or has failed
Idle air inlet passage or throttle bore is dirty or full of deposits
MAF sensor is dirty
Trouble Code: P0507
/Idle Speed Too High/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0118,
P0121-P0123, P0125, P0128, P0171-P0175, P0200, P0300, P0440-P0449,
P1111-P1115, P1121, P1122, P1380, P1381 and P1441 not set, engine
started, engine run-time over 1 minute, ECT sensor from 140-241ºF
Possible Causes:
Engine vacuum leaks, PCM valve is leaking or the wrong valve
Idle air inlet passage or throttle bore is dirty or full of deposits
IAC valve is damaged or has failed
MAF sensor is dirty, "skewed" or installed improperly
Throttle plate, throttle shaft damage
Trouble Code: P0507
/Idle Speed Too High/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0118,
P0121-P0123, P0125, P0128, P0171-P0175, P0200, P0300, P0440-P0449,
P1111-P1115, P1121, P1122, P1380, P1381 and P1441 not set, engine
started, engine run-time over 1 minute, ECT sensor from 140-241ºF
Possible Causes:
Engine vacuum leaks, PCM valve is leaking or the wrong valve
Idle air inlet passage or throttle bore is dirty or full of deposits
IAC valve is damaged or has failed
MAF sensor is dirty, "skewed" or installed improperly
Throttle plate, throttle shaft damage
Trouble Code: P0530
/A/C Refrigerant Pressure Sensor Circuit Malfunction/
Trouble Code Conditions: Engine running with A/C requested "on", and the
PCM detected the A/C Pressure sensor was less than 0.10v (9 psi) or it
was more than 4.88v (448 kPa) for 5 seconds during the test.
Possible Causes:
ACP sensor signal circuit is open or shorted to ground
ACP sensor signal circuit is shorted to VREF or system power
ACP sensor ground circuit is open
ACP sensor is damaged or has failed
PCM has failed
Trouble Code: P0530
/A/C Refrigerant Pressure Sensor Circuit Malfunction/
Trouble Code Conditions: Engine running with A/C requested "on", and the
PCM detected the A/C Pressure sensor was less than 0.10v (9 psi) or it
was more than 4.88v (448 kPa) for 5 seconds during the test.
Possible Causes:
ACP sensor signal circuit is open or shorted to ground
ACP sensor signal circuit is shorted to VREF or system power
ACP sensor ground circuit is open
ACP sensor is damaged or has failed
PCM has failed
Trouble Code: P0562
/System Voltage Too Low/
Trouble Code Conditions: Engine started, vehicle driven to a speed of
over 5 mph at an engine speed over 1000 rpm, and the PCM detected the
system voltage was less than 8.0v for 5 seconds during the test.
Possible Causes:
Check for high resistance at battery connections or the MINI fuse power
circuit
Check the drive belt for excessive wear and the proper tension
Check the condition of the battery and the Generator output
Vehicle may have been used to jump-start another
Trouble Code: P0562
/System Voltage Too Low/
Trouble Code Conditions: Engine started, vehicle driven to a speed of
over 5 mph at an engine speed over 1000 rpm, and the PCM detected the
system voltage was less than 8.0v for 5 seconds during the test.
Possible Causes:
Check for high resistance at battery connections or the MINI fuse power
circuit
Check the drive belt for excessive wear and the proper tension
Check the condition of the battery and the Generator output
Vehicle may have been used to jump-start another
Trouble Code: P0563
/System Voltage Too High/
Trouble Code Conditions: Engine started, vehicle driven to a speed of
over 5 mph at an engine speed over 1000 rpm, and the PCM detected the
system voltage was more than 18.0v for 5 seconds during the CCM test.
Possible Causes:
Check the condition of the battery (it may be worn out)
Test the operation of the Generator (it may have failed)
Vehicle may have been used to jump-start another vehicle
Trouble Code: P0563
/System Voltage Too High/
Trouble Code Conditions: Engine started, vehicle driven to a speed of
over 5 mph at an engine speed over 1000 rpm, and the PCM detected the
system voltage was more than 18.0v for 5 seconds during the CCM test.
Possible Causes:
Check the condition of the battery (it may be worn out)
Test the operation of the Generator (it may have failed)
Vehicle may have been used to jump-start another vehicle
Trouble Code: P0563
/System Voltage Too High/
Trouble Code Conditions: Engine started, and the PCM detected the system
voltage was more than 17.0v for 6 seconds during the CCM test.
Possible Causes:
Check the condition of the battery (it may be worn out)
Test the operation of the Generator (it may be overcharging)
Vehicle may have been used to jump-start another vehicle
Trouble Code: P0563
/System Voltage Too High/
Trouble Code Conditions: Engine started, and the PCM detected the system
voltage was more than 17.0v for 6 seconds during the CCM test.
Possible Causes:
Check the condition of the battery (it may be worn out)
Test the operation of the Generator (it may be overcharging)
Vehicle may have been used to jump-start another vehicle
Trouble Code: P0567
/Cruise Control Resume Switch Circuit Malfunction/
Trouble Code Conditions: Engine started, engine running and the PCM or
TAC module (with Cruise enabled) detected the Resume/Acceleration switch
indicated "on" for 90 seconds during the CCM test.
Possible Causes:
C/C resume switch is shorted to VREF or system power
C/C resume switch is stuck in the "on" position or has failed
PCM has failed
Trouble Code: P0567
/Cruise Control Resume Switch Circuit Malfunction/
Trouble Code Conditions: Engine started, engine running and the PCM or
TAC module (with Cruise enabled) detected the Resume/Acceleration switch
indicated "on" for 90 seconds during the CCM test.
Possible Causes:
C/C resume switch is shorted to VREF or system power
C/C resume switch is stuck in the "on" position or has failed
PCM has failed
Trouble Code: P0568
/Cruise Control Set/Coast Switch Circuit Malfunction/
Trouble Code Conditions: Engine started, engine running and the PCM or
TAC module (with Cruise enabled) detected the Set/Coast switch indicated
"on" for 90 seconds during the CCM test.
Possible Causes:
C/C Set/Coast switch is shorted to VREF or system power
C/C Set/Coast switch is stuck in the "on" position or has failed
PCM has failed
Trouble Code: P0568
/Cruise Control Set/Coast Switch Circuit Malfunction/
Trouble Code Conditions: Engine started, engine running and the PCM or
TAC module (with Cruise enabled) detected the Set/Coast switch indicated
"on" for 90 seconds during the CCM test.
Possible Causes:
C/C Set/Coast switch is shorted to VREF or system power
C/C Set/Coast switch is stuck in the "on" position or has failed
PCM has failed
Trouble Code: P0571
/Cruise Control Brake Switch Circuit Malfunction/
Trouble Code Conditions: Engine started, vehicle driven to a speed over
30 mph at an engine speed over 700 rpm (the test is disabled below 10
mph), and the PCM detected the a voltage signal on the Cruise Control
Brake Switch circuit (closed) when the Brake Switch circuit should b
Possible Causes:
Cruise brake switch signal circuit is shorted to ground
Cruise brake switch B+ circuit is open (test MINI Relay & fuse)
Cruise brake switch is damaged (closed) or has failed
Trouble Code: P0571
/Cruise Control Brake Switch Circuit Malfunction/
Trouble Code Conditions: Engine started, vehicle driven to a speed over
30 mph at an engine speed over 700 rpm (the test is disabled below 10
mph), and the PCM detected the a voltage signal on the Cruise Control
Brake Switch circuit (closed) when the Brake Switch circuit should b
Possible Causes:
Cruise brake switch signal circuit is shorted to ground
Cruise brake switch B+ circuit is open (test MINI Relay & fuse)
Cruise brake switch is damaged (closed) or has failed
Trouble Code: P0601
/Control Module ROM Malfunction/
Trouble Code Conditions: Key in crank or the run position, and the PCM
detected more than 3 incorrect checksums during its initial self-test.
The PCM uses an EEPROM to store software and calibration data. The PCM
uses a checksum to verify the integrity of the information. At the
Possible Causes:
The PCM must be replaced to correct this problem. A new PCM must be
programmed with the correct software/calibration.
TSB 67-65-23 contains a repair procedure for this code
Trouble Code: P0601
Control Module ROM Malfunction/
Trouble Code Conditions: Key in crank or the run position, and the PCM
detected more than 3 incorrect checksums during its initial self-test.
The PCM uses an EEPROM to store software and calibration data. The PCM
uses a checksum to verify the integrity of the information. At the
Possible Causes:
The PCM must be replaced to correct this problem. A new PCM must be
programmed with the correct software/calibration.
TSB 67-65-23 contains a repair procedure for this code
Trouble Code: P0602
/Control Module Not Programmed/
Trouble Code Conditions: Key on, and the PCM detected it did not have
the correct program to operate or that the EEPROM had been programmed
incorrectly.
Possible Causes:
Reprogram the PCM with the correct software and calibration. If this
step does not correct the problem, the PCM must be replaced and
programmed with the correct software/calibration.
Trouble Code: P0602
Control Module Not Programmed/
Trouble Code Conditions: Key on, and the PCM detected it did not have
the correct program to operate or that the EEPROM had been programmed
incorrectly.
Possible Causes:
Reprogram the PCM with the correct software and calibration. If this
step does not correct the problem, the PCM must be replaced and
programmed with the correct software/calibration.
Trouble Code: P0603
Control Module Long Term Memory Reset/
Trouble Code Conditions: DTC P0604 not set, and then with the key on,
the PCM detected the calculated checksum that did not match the previous
checksum.
Possible Causes:
An interruption to the PCM main power and/or ground circuits
Check the PCM power and ground circuits and make repairs as necessary.
Clear the codes and recheck. If it resets, the PCM must be replaced and
programmed with the correct software.
Trouble Code: P0603
/Control Module Long Term Memory Reset/
Trouble Code Conditions: DTC P0604 not set, and then with the key on,
the PCM detected the calculated checksum that did not match the previous
checksum.
Possible Causes:
An interruption to the PCM main power and/or ground circuits
Check the PCM power and ground circuits and make repairs as necessary.
Clear the codes and recheck. If it resets, the PCM must be replaced and
programmed with the correct software.
Trouble Code: P0604
Control Module Random Access Memory Failure/
Trouble Code Conditions: Key on for 5 seconds, and the PCM detected the
internal data test of its RAM failed. The PCM copies the program
information stored in the RAM. This allows the PCM to work with, and
make any updates to this data. The PCM checks for problems in all areas of
Possible Causes:
The PCM must be replaced to correct this problem. A new PCM must be
programmed with the correct software/calibration.
Trouble Code: P0604
Control Module Random Access Memory Failure/
Trouble Code Conditions: Key on for 5 seconds, and the PCM detected the
internal data test of its RAM failed. The PCM copies the program
information stored in the RAM. This allows the PCM to work with, and
make any updates to this data. The PCM checks for problems in all areas of
Possible Causes:
The PCM must be replaced to correct this problem. A new PCM must be
programmed with the correct software/calibration.
Trouble Code: P0606
Control Module Internal Performance/
Trouble Code Conditions: DTC P0601 and P0604 not set, key on, and the
PCM determined that an internal performance problem existed within its
controller.
Possible Causes:
The PCM must be replaced to correct this problem. A new PCM must be
programmed with the correct software/calibration.
Trouble Code: P0606
Control Module Internal Performance/
Trouble Code Conditions: DTC P0601 and P0604 not set, key on, and the
PCM determined that an internal performance problem existed within its
controller.
Possible Causes:
The PCM must be replaced to correct this problem. A new PCM must be
programmed with the correct software/calibration.
Trouble Code: P0607
Control Module Performance/
Trouble Code Conditions: Key on or engine running; then after the
initial PCM power up sequence, the PCM detected an internal performance
problem.
Possible Causes:
The PCM must be replaced to correct this problem. A new PCM must be
programmed with the correct software/calibration.
Trouble Code: P0607
Control Module Performance
Trouble Code Conditions: Key on or engine running; then after the
initial PCM power up sequence, the PCM detected an internal performance
problem.
Possible Causes:
The PCM must be replaced to correct this problem. A new PCM must be
programmed with the correct software/calibration.
Trouble Code: P0608
Vehicle Speed Output Circuit Malfunction/
Trouble Code Conditions: Engine started, engine speed over 600 rpm, and
the PCM detected the Actual and Commanded state of the VSS output
circuit did not match for 5 seconds. The PCM creates the VSS output
signal by causing the circuit to pulse to ground, and monitoring the opera
Possible Causes:
VSS output signal circuit is open, shorted to ground or to power
VSS output signal problem related to the Instrument Cluster or the
Electronic Suspension Control Module (internal problem)
PCM has failed
Trouble Code: P0608
Vehicle Speed Output Circuit Malfunction/
Trouble Code Conditions: Engine started, engine speed over 600 rpm, and
the PCM detected the Actual and Commanded state of the VSS output
circuit did not match for 5 seconds. The PCM creates the VSS output
signal by causing the circuit to pulse to ground, and monitoring the opera
Possible Causes:
VSS output signal circuit is open, shorted to ground or to power
VSS output signal problem related to the Instrument Cluster or the
Electronic Suspension Control Module (internal problem)
PCM has failed
Trouble Code: P0645
Air Conditioning Clutch Relay Control Circuit Malfunction/
Trouble Code Conditions: Engine started, engine speed over 400 rpm,
system voltage over 10.0v, and the PCM detected the Actual and Commanded
state of the A/C Relay Control circuit did not match for 5 seconds.
Possible Causes:
A/C relay control circuit is open, shorted to ground or to power
A/C relay power circuit is open (test the A/C CRUISE mini fuse)
A/C relay is damaged or has failed
PCM has failed
Trouble Code: P0645
Air Conditioning Clutch Relay Control Circuit Malfunction/
Trouble Code Conditions: Engine started, engine speed over 400 rpm,
system voltage over 10.0v, and the PCM detected the Actual and Commanded
state of the A/C Relay Control circuit did not match for 5 seconds.
Possible Causes:
A/C relay control circuit is open, shorted to ground or to power
A/C relay power circuit is open (test the A/C CRUISE mini fuse)
A/C relay is damaged or has failed
PCM has failed
Trouble Code: P0650
Malfunction Indicator Lamp Circuit Malfunction/
Trouble Code Conditions: Engine started, system voltage over 10.0v, and
the PCM detected the Commanded state and Actual state of the MIL control
driver circuit did not match for 5-30 seconds in the test.
Possible Causes:
MIL control circuit is open, shorted to ground or shorted to system power
MIL control power circuit is open in the Instrument Cluster
MIL (the lamp) is damaged or has failed
Instrument Cluster or the PCM has failed
Trouble Code: P0650
Malfunction Indicator Lamp Circuit Malfunction/
Trouble Code Conditions: Engine started, system voltage over 10.0v, and
the PCM detected the Commanded state and Actual state of the MIL control
driver circuit did not match for 5-30 seconds in the test.
Possible Causes:
MIL control circuit is open, shorted to ground or shorted to system power
MIL control power circuit is open in the Instrument Cluster
MIL (the lamp) is damaged or has failed
Instrument Cluster or the PCM has failed
Trouble Code: P0654
Engine Speed Output Control Circuit Malfunction/
Trouble Code Conditions: Engine started, engine speed over 600 rpm, and
the PCM detected the Commanded and Actual state of the Engine Speed
Output circuit did not match for 10 seconds in the test.
Possible Causes:
Engine speed circuit is open or shorted to ground
Engine speed is shorted to system power
Instrument Cluster has failed
PCM has failed
Trouble Code: P0654
Engine Speed Output Control Circuit Malfunction/
Trouble Code Conditions: Engine started, engine speed over 600 rpm, and
the PCM detected the Commanded and Actual state of the Engine Speed
Output circuit did not match for 10 seconds in the test.
Possible Causes:
Engine speed circuit is open or shorted to ground
Engine speed is shorted to system power
Instrument Cluster has failed
PCM has failed
Trouble Code: P0656
Fuel Gauge Output Control Circuit Malfunction/
Trouble Code Conditions: Engine started, engine speed over 600 rpm, and
the PCM detected the Actual and Commanded state of the Fuel Gauge Output
Control circuit did not match for 10 seconds.
Possible Causes:
Fuel gauge circuit is open or shorted to ground
Fuel gauge control circuit is shorted to system power
Instrument Cluster has failed
PCM has failed
Trouble Code: P0656
Fuel Gauge Output Control Circuit Malfunction/
Trouble Code Conditions: Engine started, engine speed over 600 rpm, and
the PCM detected the Actual and Commanded state of the Fuel Gauge Output
Control circuit did not match for 10 seconds.
Possible Causes:
Fuel gauge circuit is open or shorted to ground
Fuel gauge control circuit is shorted to system power
Instrument Cluster has failed
PCM has failed
Trouble Code: P0705
Trans axle Range Switch Circuit Malfunction/
Trouble Code Conditions: Engine started, system voltage over 10.0v, and
the PCM detected an invalid combination of Trans axle Range (TR) switch
signals for 10 seconds.
Possible Causes:
TR switch circuit(s) is open or shorted to ground
TR switch circuit(s) is shorted to system power (B+)
TR switch is damaged or out of adjustment
PCM has failed
Trouble Code: P0705
Trans axle Range Switch Circuit Malfunction/
Trouble Code Conditions: Engine started, system voltage over 10.0v, and
the PCM detected an invalid combination of Trans axle Range (TR) switch
signals for 10 seconds.
Possible Causes:
TR switch circuit(s) is open or shorted to ground
TR switch circuit(s) is shorted to system power (B+)
TR switch is damaged or out of adjustment
PCM has failed
Trouble Code: P0706
Trans axle Range Switch (PRNDL) Performance/
Trouble Code Conditions: Engine started, system voltage over 10.0v, and
the PCM detected the Trans axle Range switch signal indicated a range
other than P/N during start-up Note: This test must fail 2 out of 4
consecutive tests in order to set this trouble code.
Possible Causes:
TR switch circuit is or shorted to ground
TR switch circuit is shorted to another PRNDL circuit
TR switch is damaged or out of adjustment
PCM has failed
Trouble Code: P0706
Trans axle Range Switch (PRNDL) Performance/
Trouble Code Conditions: Engine started, system voltage over 10.0v, and
the PCM detected the Trans axle Range switch signal indicated a range
other than P/N during start-up Note: This test must fail 2 out of 4
consecutive tests in order to set this trouble code.
Possible Causes:
TR switch circuit is or shorted to ground
TR switch circuit is shorted to another PRNDL circuit
TR switch is damaged or out of adjustment
PCM has failed
Trouble Code: P0711
TFT Sensor Range/Performance (4L60-E, 4L80-E)/
Trouble Code Conditions: DTC P0502, P0503, P0894 or P1870 not set,
engine started, engine run-time over 409 seconds, system voltage over
10.0v, ECT sensor more than 158ºF and a change of 90ºF since start-up,
TFT sensor from -40 to 70ºF at start-up, then TFT sensor from -36 to 304ºF,
Possible Causes:
ATF fluid level too low or the fluid is contaminated or burnt
TFT sensor is contaminated, damaged or "skewed"
PCM has failed
Trouble Code: P0711
TFT Sensor Range/Performance (4L60-E, 4L80-E)/
Trouble Code Conditions: DTC P0502, P0503, P0894 or P1870 not set,
engine started, engine run-time over 409 seconds, system voltage over
10.0v, ECT sensor more than 158ºF and a change of 90ºF since start-up,
TFT sensor from -40 to 70ºF at start-up, then TFT sensor from -36 to 304ºF,
Possible Causes:
ATF fluid level too low or the fluid is contaminated or burnt
TFT sensor is contaminated, damaged or "skewed"
PCM has failed
Trouble Code: P0712
TFT Sensor Circuit Low Input/
Trouble Code Conditions: DTC P0560 not set, engine started, engine
running and the PCM detected the TFT sensor was more than 298ºF for 10
seconds.
Possible Causes:
TFT sensor connector is damaged or shorted
TFT sensor signal circuit is shorted to sensor or chassis ground
TFT sensor is damaged or has failed (it may be shorted)
PCM has failed
Trouble Code: P0712
TFT Sensor Circuit Low Input/
Trouble Code Conditions: DTC P0560 not set, engine started, engine
running and the PCM detected the TFT sensor was more than 298ºF for 10
seconds.
Possible Causes:
TFT sensor connector is damaged or shorted
TFT sensor signal circuit is shorted to sensor or chassis ground
TFT sensor is damaged or has failed (it may be shorted)
PCM has failed
Trouble Code: P0713
TFT Sensor Circuit High Input/
Trouble Code Conditions: DTC P0117, P0118 and P0560 not set, engine
started, and the PCM detected the TFT sensor was less than -33ºF (a
voltage of over 4.92v) for 10 seconds during the CCM test.
Possible Causes:
TFT sensor connector is damaged, loose or open
TFT sensor signal circuit is open between the sensor and PCM
TFT sensor signal circuit is shorted to VREF or system power
TFT sensor is damaged or has failed (it may be open)
PCM has failed
Trouble Code: P0713
TFT Sensor Circuit High Input/
Trouble Code Conditions: DTC P0117, P0118 and P0560 not set, engine
started, and the PCM detected the TFT sensor was less than -33ºF (a
voltage of over 4.92v) for 10 seconds during the CCM test.
Possible Causes:
TFT sensor connector is damaged, loose or open
TFT sensor signal circuit is open between the sensor and PCM
TFT sensor signal circuit is shorted to VREF or system power
TFT sensor is damaged or has failed (it may be open)
PCM has failed
Trouble Code: P0719
TCC Brake Switch Circuit Low Input (4L60-E)/
Trouble Code Conditions: DTC P0502 not set, engine started, vehicle
speed less than 5 mph, then the vehicle speed was 5-20 mph for 3
seconds, followed by a period with the speed over 20 mph for 6-8
seconds, and the PCM detected the Brake Switch circuit indicated (0)
volts for 15
Possible Causes:
TCC brake switch circuit is open or shorted to ground
TCC brake switch power circuit is open (check the PCM IGN, ENG GEN or
other related fuse in under-hood junction block)
TCC brake switch is out of adjustment or damaged
PCM has failed
Trouble Code: P0719
TCC Brake Switch Circuit Low Input (4L60-E)/
Trouble Code Conditions: DTC P0502 not set, engine started, vehicle
speed less than 5 mph, then the vehicle speed was 5-20 mph for 3
seconds, followed by a period with the speed over 20 mph for 6-8
seconds, and the PCM detected the Brake Switch circuit indicated (0)
volts for 15
Possible Causes:
TCC brake switch circuit is open or shorted to ground
TCC brake switch power circuit is open (check the PCM IGN, ENG GEN or
other related fuse in under-hood junction block)
TCC brake switch is out of adjustment or damaged
PCM has failed
Trouble Code: P0724
TCC Brake Switch Circuit High Input (4L60-E)/
Trouble Code Conditions: DTC P0502 and P0503 not set, vehicle speed more
than 20 mph for 6 seconds, then the speed decreased to 5 mph for 2-6
seconds, followed by a period with the vehicle speed less than 5 mph,
and the PCM detected the Brake switch circuit was 12-14v at least 7
Possible Causes:
Check for ABS trouble codes (they can cause this code to set)
TCC brake switch circuit is shorted to system power
TCC brake switch is out of adjustment or damaged
PCM has failed
Trouble Code: P0724
TCC Brake Switch Circuit High Input (4L60-E)/
Trouble Code Conditions: DTC P0502 and P0503 not set, vehicle speed more
than 20 mph for 6 seconds, then the speed decreased to 5 mph for 2-6
seconds, followed by a period with the vehicle speed less than 5 mph,
and the PCM detected the Brake switch circuit was 12-14v at least 7
Possible Causes:
Check for ABS trouble codes (they can cause this code to set)
TCC brake switch circuit is shorted to system power
TCC brake switch is out of adjustment or damaged
PCM has failed
Trouble Code: P0740
TCC Solenoid Circuit Malfunction (4L60-E)/
Trouble Code Conditions: Engine started, Fuel Cutoff "off", and the PCM
detected the TCC voltage was high with the TCC Solenoid commanded "on",
or it was "low" with it commanded "off" for 5 seconds.
Possible Causes:
TCC solenoid control circuit is open, shorted to ground or to B+
TCC solenoid power circuit is open (test the TRANS fuse)
TCC solenoid is damaged or has failed
PCM has failed
Trouble Code: P0740
TCC Solenoid Circuit Malfunction (4L60-E)/
Trouble Code Conditions: Engine started, Fuel Cutoff "off", and the PCM
detected the TCC voltage was high with the TCC Solenoid commanded "on",
or it was "low" with it commanded "off" for 5 seconds.
Possible Causes:
TCC solenoid control circuit is open, shorted to ground or to B+
TCC solenoid power circuit is open (test the TRANS fuse)
TCC solenoid is damaged or has failed
PCM has failed
Trouble Code: P0742
TCC System Mechanically Stuck Off (4L60-E)/
Trouble Code Conditions: DTC P0122, P0123, P0502, P0503, P0740, P1120,
P1220, P1810 and P1860 not set, engine run-time over 5 seconds, system
voltage over 10.0v, not in Fuel Cutoff mode, engine vacuum from 0-105
kPa, engine torque from 50-400 ft lbs, commanded gear not 1st, speed
Possible Causes:
Converter clutch apply valve stuck in the "on" (apply) position
Exhaust orifice in the TCC solenoid valve is clogged
Release pass is clogged or restricted
Transmission cooler line is bent or restricted
Valve body gasket is damaged or misaligned
Trouble Code: P0742
TCC System Mechanically Stuck Off (4L60-E)/
Trouble Code Conditions: DTC P0122, P0123, P0502, P0503, P0740, P1120,
P1220, P1810 and P1860 not set, engine run-time over 5 seconds, system
voltage over 10.0v, not in Fuel Cutoff mode, engine vacuum from 0-105
kPa, engine torque from 50-400 ft lbs, commanded gear not 1st, speed
Possible Causes:
Converter clutch apply valve stuck in the "on" (apply) position
Exhaust orifice in the TCC solenoid valve is clogged
Release pass is clogged or restricted
Transmission cooler line is bent or restricted
Valve body gasket is damaged or misaligned
Trouble Code: P0748
Pressure Control Solenoid Circuit Malfunction (4L60-E)/
Trouble Code Conditions: Engine started, system voltage over 10.0v, and
the PCM detected an unexpected voltage condition on the Pressure Control
(PC) solenoid circuit for 100 ms during the CCM test.
Possible Causes:
PC solenoid high side circuit is open, shorted to ground or B+
PC solenoid low side circuit is open, shorted to ground or to B+
PC solenoid high or low side driver is damaged or has failed
Trouble Code: P0748
Pressure Control Solenoid Circuit Malfunction (4L60-E)/
Trouble Code Conditions: Engine started, system voltage over 10.0v, and
the PCM detected an unexpected voltage condition on the Pressure Control
(PC) solenoid circuit for 100 ms during the CCM test.
Possible Causes:
PC solenoid high side circuit is open, shorted to ground or B+
PC solenoid low side circuit is open, shorted to ground or to B+
PC solenoid high or low side driver is damaged or has failed
Trouble Code: P0751
A/T 1-2 Shift Solenoid - No 1st or 4th Gear (4L60-E)/
Trouble Code Conditions: DTC P0122, P0123, P0502, P0503, P0740, P0742,
P0753, P0758, P0785, P1810 and P1860 not set, engine started, vehicle
driven to over 5 mph, Fuel Cutoff inactive, TP angle more than 9%, TFT
sensor from 68-266ºF, gear range is D4, D3, D2 or D1, engine torque
Possible Causes:
ATF is burnt or contaminated, or the level is incorrect
Transmission has an internal damage to the torque converter
Shift solenoid valve seals are damaged or leaking
Transmission is damaged or it has failed
Trouble Code: P0751
A/T 1-2 Shift Solenoid - No 1st or 4th Gear (4L60-E)
Trouble Code Conditions: DTC P0122, P0123, P0502, P0503, P0740, P0742,
P0753, P0758, P0785, P1810 and P1860 not set, engine started, vehicle
driven to over 5 mph, Fuel Cutoff inactive, TP angle more than 9%, TFT
sensor from 68-266ºF, gear range is D4, D3, D2 or D1, engine torque
Possible Causes:
ATF is burnt or contaminated, or the level is incorrect
Transmission has an internal damage to the torque converter
Shift solenoid valve seals are damaged or leaking
Transmission is damaged or it has failed
Trouble Code: P0752
A/T 1-2 Shift Solenoid - No 2nd or 3rd Gear (4L60-E)
Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0122, P0123,
P0502, P0503, P0740, P1810 and P1860 not set, engine speed at 1000-3000
rpm, VSS at 20-75 mph, Fuel Cutoff "off", TP angle from 13-99%, TFT
sensor at 68-266ºF, engine torque at 50-400 lb ft., vacuum at 0-15 kPa
Possible Causes:
ATF is burnt or contaminated, or the level is incorrect
Transmission has an internal damage to the torque converter
Shift solenoid valve seals are damaged or leaking
Transmission has failed
Trouble Code: P0752
A/T 1-2 Shift Solenoid - No 2nd or 3rd Gear (4L60-E)
Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0122, P0123,
P0502, P0503, P0740, P1810 and P1860 not set, engine speed at 1000-3000
rpm, VSS at 20-75 mph, Fuel Cutoff "off", TP angle from 13-99%, TFT
sensor at 68-266ºF, engine torque at 50-400 lb ft., vacuum at 0-15 kPa
Possible Causes:
ATF is burnt or contaminated, or the level is incorrect
Transmission has an internal damage to the torque converter
Shift solenoid valve seals are damaged or leaking
Transmission has failed
Trouble Code: P0753
A/T 1-2 Shift Solenoid Circuit Malfunction (4L60-E)
Trouble Code Conditions: Engine started, Fuel Cutoff inactive, system
voltage over 10.0v, and the PCM detected an unexpected voltage condition
on the 1-2 Shift Solenoid control circuit during the CCM test.
Possible Causes:
1-2 shift solenoid control circuit is open or shorted to ground
1-2 shift solenoid control circuit is shorted to system power
1-2 shift solenoid is damaged or has failed
PCM has failed
Trouble Code: P0753
A/T 1-2 Shift Solenoid Circuit Malfunction (4L60-E)
Trouble Code Conditions: Engine started, Fuel Cutoff inactive, system
voltage over 10.0v, and the PCM detected an unexpected voltage condition
on the 1-2 Shift Solenoid control circuit during the CCM test.
Possible Causes:
1-2 shift solenoid control circuit is open or shorted to ground
1-2 shift solenoid control circuit is shorted to system power
1-2 shift solenoid is damaged or has failed
PCM has failed
Trouble Code: P0756
A/T 2-3 Shift Solenoid - No 2nd or 3rd Gear (4L60-E)
Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0122, P0123,
P0502, P0503, P0740, P0742, P0753, P0758, P0785, P1810, P1860 and P1870
not set, engine started, vehicle driven to a speed of over 5 mph, system
voltage over 10.0v, Fuel Cutoff inactive, TP angle more than 9%,
Possible Causes:
ATF is burnt or contaminated
Transmission has plugged or restricted fluid circuits
Shift solenoid valve seals are leaking or damaged
Transmission has failed
Trouble Code: P0756
A/T 2-3 Shift Solenoid - No 2nd or 3rd Gear (4L60-E)
Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0122, P0123,
P0502, P0503, P0740, P0742, P0753, P0758, P0785, P1810, P1860 and P1870
not set, engine started, vehicle driven to a speed of over 5 mph, system
voltage over 10.0v, Fuel Cutoff inactive, TP angle more than 9%,
Possible Causes:
ATF is burnt or contaminated
Transmission has plugged or restricted fluid circuits
Shift solenoid valve seals are leaking or damaged
Transmission has failed
Trouble Code: P0758
A/T 2-3 Shift Solenoid Circuit Malfunction (4L60-E)
Trouble Code Conditions: Engine speed over 450 rpm for 5 seconds, system
voltage over 10.0v, and the PCM detected an unexpected voltage on the
2-3 Shift Solenoid control circuit for 4-5 seconds.
Possible Causes:
2-3 shift solenoid control circuit is open or shorted to ground
2-3 shift solenoid control circuit is shorted to system power
2-3 shift solenoid power circuit is open (test the TRANS fuse)
2-3 shift solenoid is damaged or has failed
PCM has failed
Trouble Code: P0758
A/T 2-3 Shift Solenoid Circuit Malfunction (4L60-E)
Trouble Code Conditions: Engine speed over 450 rpm for 5 seconds, system
voltage over 10.0v, and the PCM detected an unexpected voltage on the
2-3 Shift Solenoid control circuit for 4-5 seconds.
Possible Causes:
2-3 shift solenoid control circuit is open or shorted to ground
2-3 shift solenoid control circuit is shorted to system power
2-3 shift solenoid power circuit is open (test the TRANS fuse)
2-3 shift solenoid is damaged or has failed
PCM has failed
Trouble Code: P0758
A/T 2-3 Shift Solenoid Circuit Malfunction (4L60-E)
Trouble Code Conditions: P0560 not set, engine speed over 500 rpm for 5
seconds, and the PCM detected an unexpected voltage condition on the 2-3
Shift Solenoid Control circuit for 5 seconds.
Possible Causes:
2-3 shift solenoid control circuit is open or shorted to ground
2-3 shift solenoid control circuit is shorted to system power
2-3 shift solenoid power circuit is open (check ENG CTRL fuse)
2-3 shift solenoid is damaged or has failed
PCM has failed
Trouble Code: P0758
A/T 2-3 Shift Solenoid Circuit Malfunction (4L60-E)
Trouble Code Conditions: P0560 not set, engine speed over 500 rpm for 5
seconds, and the PCM detected an unexpected voltage condition on the 2-3
Shift Solenoid Control circuit for 5 seconds.
Possible Causes:
2-3 shift solenoid control circuit is open or shorted to ground
2-3 shift solenoid control circuit is shorted to system power
2-3 shift solenoid power circuit is open (check ENG CTRL fuse)
2-3 shift solenoid is damaged or has failed
PCM has failed
Trouble Code: P0785
/A/T 2-3 Shift Solenoid Circuit Malfunction (4L60-E)/
Trouble Code Conditions: P0560 not set, engine started, engine speed
over 500 rpm for 5 seconds, and the PCM detected an unexpected voltage
on the 2-3 Shift Solenoid Control circuit for 5 seconds.
Possible Causes:
2-3 shift solenoid control circuit is open or shorted to ground
2-3 shift solenoid control circuit is shorted to system power
2-3 shift solenoid power circuit is open (check ENG CTRL fuse)
2-3 shift solenoid is damaged or has failed
PCM has failed
Trouble Code: P0785
/A/T 2-3 Shift Solenoid Circuit Malfunction (4L60-E)/
Trouble Code Conditions: P0560 not set, engine started, engine speed
over 500 rpm for 5 seconds, and the PCM detected an unexpected voltage
on the 2-3 Shift Solenoid Control circuit for 5 seconds.
Possible Causes:
2-3 shift solenoid control circuit is open or shorted to ground
2-3 shift solenoid control circuit is shorted to system power
2-3 shift solenoid power circuit is open (check ENG CTRL fuse)
2-3 shift solenoid is damaged or has failed
PCM has failed
Trouble Code: P1111
/IAT Sensor Circuit Intermittent High Input/
Trouble Code Conditions: DTC P0101-P0103, P0116-P0118, P0125, P0128,
P0502, P0503, P1114 and P1115 not set, engine started, engine run-time
over 3 minutes, VSS under 35 mph, MAF sensor less than 15 g/sec, ECT
sensor more than 140ºF, and the PCM detected an intermittent high voltage
Possible Causes:
IAT sensor signal circuit is open (intermittent fault)
IAT sensor ground circuit is open (intermittent fault)
IAT sensor is damaged (an intermittent "open" condition)
PCM has failed
Trouble Code: P1111
/IAT Sensor Circuit Intermittent High Input/
Trouble Code Conditions: DTC P0101-P0103, P0116-P0118, P0125, P0128,
P0502, P0503, P1114 and P1115 not set, engine started, engine run-time
over 3 minutes, VSS under 35 mph, MAF sensor less than 15 g/sec, ECT
sensor more than 140ºF, and the PCM detected an intermittent high voltage
Possible Causes:
IAT sensor signal circuit is open (intermittent fault)
IAT sensor ground circuit is open (intermittent fault)
IAT sensor is damaged (an intermittent "open" condition)
PCM has failed
Trouble Code: P1112
/IAT Sensor Circuit Intermittent Low Input/
Trouble Code Conditions: DTC P0101-P0103, P0116-P0118, P0125, P0128,
P0502, P0503, P1114 and P1115 not set, engine run-time over 3 minutes,
VSS under 35 mph, MAF sensor less than 15 g/sec, ECT sensor more than
140ºF, and the PCM detected an intermittent low voltage condition (Scan
Possible Causes:
IAT sensor signal circuit is shorted to ground (intermittent fault)
IAT sensor is damaged (an intermittent "shorted" condition)
PCM has failed
Trouble Code: P1112
/IAT Sensor Circuit Intermittent Low Input/
Trouble Code Conditions: DTC P0101-P0103, P0116-P0118, P0125, P0128,
P0502, P0503, P1114 and P1115 not set, engine run-time over 3 minutes,
VSS under 35 mph, MAF sensor less than 15 g/sec, ECT sensor more than
140ºF, and the PCM detected an intermittent low voltage condition (Scan
Possible Causes:
IAT sensor signal circuit is shorted to ground (intermittent fault)
IAT sensor is damaged (an intermittent "shorted" condition)
PCM has failed
Trouble Code: P1114
/ECT Sensor Circuit Intermittent Low Input/
Trouble Code Conditions: Engine started, engine run-time over 10 seconds,
system voltage over 10.0v, and the PCM detected an intermittent "low"
voltage condition (Scan Tool reads over 282ºF) for 1 second out of a 20
second period during the CCM test.
Possible Causes:
ECT sensor signal circuit shorted to ground (intermittent fault)
ECT sensor has failed (possible intermittent shorted condition)
PCM has failed
Trouble Code: P1114
/ECT Sensor Circuit Intermittent Low Input/
Trouble Code Conditions: Engine started, engine run-time over 10 seconds,
system voltage over 10.0v, and the PCM detected an intermittent "low"
voltage condition (Scan Tool reads over 282ºF) for 1 second out of a 20
second period during the CCM test.
Possible Causes:
ECT sensor signal circuit shorted to ground (intermittent fault)
ECT sensor has failed (possible intermittent shorted condition)
PCM has failed
Trouble Code: P1115
/ECT Sensor Circuit Intermittent High Input/
Trouble Code Conditions: Engine started, engine run-time over 60 seconds,
system voltage over 10.0v, and the PCM detected an intermittent "high"
voltage condition (Scan Tool reads below -31ºF) for 1 second out of a 20
second period during the CCM test.
Possible Causes:
ECT sensor signal circuit is open between the sensor and PCM
ECT sensor ground circuit is open between sensor and PCM
ECT sensor has failed (possible intermittent "open" condition)
PCM has failed
Trouble Code: P1115
/ECT Sensor Circuit Intermittent High Input/
Trouble Code Conditions: Engine started, engine run-time over 60 seconds,
system voltage over 10.0v, and the PCM detected an intermittent "high"
voltage condition (Scan Tool reads below -31ºF) for 1 second out of a 20
second period during the CCM test.
Possible Causes:
ECT sensor signal circuit is open between the sensor and PCM
ECT sensor ground circuit is open between sensor and PCM
ECT sensor has failed (possible intermittent "open" condition)
PCM has failed
Trouble Code: P1121
/TP Sensor Circuit Intermittent High Input/
Trouble Code Conditions: Key on or engine running; and the PCM detected
an intermittent high voltage condition on the TP sensor signal circuit
(more than 4.80v) for a 10 second period during the CCM test.
Possible Causes:
TP sensor signal circuit is shorted to VREF (intermittent fault)
TP sensor ground circuit is open (an intermittent fault)
TP sensor is damaged or has failed (possible intermittent open)
PCM has failed
Trouble Code: P1121
/TP Sensor Circuit Intermittent High Input/
Trouble Code Conditions: Key on or engine running; and the PCM detected
an intermittent high voltage condition on the TP sensor signal circuit
(more than 4.80v) for a 10 second period during the CCM test.
Possible Causes:
TP sensor signal circuit is shorted to VREF (intermittent fault)
TP sensor ground circuit is open (an intermittent fault)
TP sensor is damaged or has failed (possible intermittent open)
PCM has failed
Trouble Code: P1122
/TP Sensor Circuit Intermittent Low Input/
Trouble Code Conditions: Engine started and the PCM detected an
intermittent high voltage condition on the TP sensor signal circuit
(less than 0.20v) for 1 second out of a 20 second period during the CCM
test.
Possible Causes:
TP sensor signal circuit is shorted to ground (intermittent fault)
TP sensor VREF circuit is open or grounded (intermittent fault)
TP sensor is damaged or has failed (possible intermittent short)
PCM has failed
Trouble Code: P1122
/TP Sensor Circuit Intermittent Low Input/
Trouble Code Conditions: Engine started and the PCM detected an
intermittent high voltage condition on the TP sensor signal circuit
(less than 0.20v) for 1 second out of a 20 second period during the CCM
test.
Possible Causes:
TP sensor signal circuit is shorted to ground (intermittent fault)
TP sensor VREF circuit is open or grounded (intermittent fault)
TP sensor is damaged or has failed (possible intermittent short)
PCM has failed
Trouble Code: P1133
/HO2S-11 (Bank 1 Sensor 1) Insufficient Switching/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0118,
P0131-P0135, P0151-P0155, P0200, P0300, P0410, P0440-P0446, P0452,
P0453, P1120, P1125, P1220, P1221, P1258, P1415, P1416, P1441,
P1514-P1518 not set, engine started, engine speed from 1000-2300 rpm for
160 second
Possible Causes:
Air leaks present in the exhaust manifold or the exhaust pipes
Fuel pressure is too high (i.e., causing a rich air fuel mixture)
HO2S may be contaminated (due to improper fuel or silicone)
HO2S signal high or low reference circuit has high resistance
Trouble Code: P1133
/HO2S-11 (Bank 1 Sensor 1) Insufficient Switching/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0118,
P0131-P0135, P0151-P0155, P0200, P0300, P0410, P0440-P0446, P0452,
P0453, P1120, P1125, P1220, P1221, P1258, P1415, P1416, P1441,
P1514-P1518 not set, engine started, engine speed from 1000-2300 rpm for
160 second
Possible Causes:
Air leaks present in the exhaust manifold or the exhaust pipes
Fuel pressure is too high (i.e., causing a rich air fuel mixture)
HO2S may be contaminated (due to improper fuel or silicone)
HO2S signal high or low reference circuit has high resistance
Trouble Code: P1134
/HO2S-11 (Bank 1 Sensor 1) Transition Time Ratio/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0118,
P0131-P0135, P0151-P0155, P0200, P0300, P0410, P0440-P0446, P0452,
P0453, P1120, P1125, P1220, P1221, P1258, P1415, P1416, P1441, P1514 and
P1518 not set, engine speed at 1000-2300 rpm for 160 seconds in closed l
Possible Causes:
Air leaks present in the exhaust manifold or the exhaust pipes
HO2S may be contaminated (due to improper fuel or silicone)
HO2S signal low reference circuit has high resistance
HO2S heater element has failed, or the heater circuit is open
PCM has failed
Trouble Code: P1134
/HO2S-11 (Bank 1 Sensor 1) Transition Time Ratio/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0118,
P0131-P0135, P0151-P0155, P0200, P0300, P0410, P0440-P0446, P0452,
P0453, P1120, P1125, P1220, P1221, P1258, P1415, P1416, P1441, P1514 and
P1518 not set, engine speed at 1000-2300 rpm for 160 seconds in closed l
Possible Causes:
Air leaks present in the exhaust manifold or the exhaust pipes
HO2S may be contaminated (due to improper fuel or silicone)
HO2S signal low reference circuit has high resistance
HO2S heater element has failed, or the heater circuit is open
PCM has failed
Trouble Code: P1153
/HO2S-21 (Bank 2 Sensor 1) Insufficient Switching/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0118,
P0131-P0135, P0151-P0155, P0200, P0300, P0410, P0440-P0446, P0452,
P0453, P1120, P1125, P1220, P1221, P1258, P1415, P1416, P1441,
P1514-P1518 not set, engine started, engine speed from 1000-2300 rpm for
160 second
Possible Causes:
Air leaks present in the exhaust manifold or the exhaust pipes
Fuel pressure is too high (i.e., causing a rich air fuel mixture)
HO2S may be contaminated (due to improper fuel or silicone)
HO2S signal high or low reference circuit has high resistance
Trouble Code: P1153
/HO2S-21 (Bank 2 Sensor 1) Insufficient Switching/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0118,
P0131-P0135, P0151-P0155, P0200, P0300, P0410, P0440-P0446, P0452,
P0453, P1120, P1125, P1220, P1221, P1258, P1415, P1416, P1441,
P1514-P1518 not set, engine started, engine speed from 1000-2300 rpm for
160 second
Possible Causes:
Air leaks present in the exhaust manifold or the exhaust pipes
Fuel pressure is too high (i.e., causing a rich air fuel mixture)
HO2S may be contaminated (due to improper fuel or silicone)
HO2S signal high or low reference circuit has high resistance
Trouble Code: P1154
/HO2S-21 (Bank 2 Sensor 1) Transition Time Ratio/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0118,
P0131-P0135, P0151-P0155, P0200, P0300, P0410, P0440-P0446, P0452,
P0453, P1120, P1125, P1220, P1221, P1258, P1415, P1416, P1441,
P1514-P1518 not set, engine speed from 1000-2300 rpm for 160 seconds in
closed loo
Possible Causes:
Air leaks present in the exhaust manifold or the exhaust pipes
HO2S may be contaminated (due to improper fuel or silicone)
HO2S signal low reference circuit has high resistance
HO2S heater element has failed, or the heater circuit is open
PCM has failed
Trouble Code: P1154
/HO2S-21 (Bank 2 Sensor 1) Transition Time Ratio/
Trouble Code Conditions: DTC P0101-P0103, P0106-P0108, P0112-P0118,
P0131-P0135, P0151-P0155, P0200, P0300, P0410, P0440-P0446, P0452,
P0453, P1120, P1125, P1220, P1221, P1258, P1415, P1416, P1441,
P1514-P1518 not set, engine speed from 1000-2300 rpm for 160 seconds in
closed loo
Possible Causes:
Air leaks present in the exhaust manifold or the exhaust pipes
HO2S may be contaminated (due to improper fuel or silicone)
HO2S signal low reference circuit has high resistance
HO2S heater element has failed, or the heater circuit is open
PCM has failed
Trouble Code: P1336
/CKP Sensor System Variation Not Learned/
Trouble Code Conditions: DTC P0336, P0341and P1374 not set, engine
started, ECT sensor more than 158ºF, and the PCM did not detect any CKP
variation values. The Crankshaft Position system variation-learning
feature is used to calculate reference period errors caused by slight tol
Possible Causes:
Set the parking brake and block the drive wheels for safety.
Verify the hood is closed.
Read the trouble codes. If a code is set, refer to that code.
Start the engine. Allow engine temperature to reach at least 158ºF
(70ºC). Then key off.
Trouble Code: P1336
CKP Sensor System Variation Not Learned/
Trouble Code Conditions: DTC P0336, P0341and P1374 not set, engine
started, ECT sensor more than 158ºF, and the PCM did not detect any CKP
variation values. The Crankshaft Position system variation-learning
feature is used to calculate reference period errors caused by slight tol
Possible Causes:
Set the parking brake and block the drive wheels for safety.
Verify the hood is closed.
Read the trouble codes. If a code is set, refer to that code.
Start the engine. Allow engine temperature to reach at least 158ºF
(70ºC). Then key off.
Trouble Code: P1380
/EBTCM DTC Detected, Rough Road Data Unusable/
Trouble Code Conditions: DTC P0101-P0103, P0121-P0123, P0335, P0336,
P0742, P1120, P1121, P1220 and P1221 not set, vehicle speed over 10 mph
at an engine speed under 3200 rpm (under 5000 rpm on 3.8L VIN K), engine
load less than 60%, DTC P0300 set with the MIL requested "on"
Possible Causes:
Service the ABS before diagnosing a misfire because an actual engine
misfire may or may not exist. Also, an actual engine misfire may have
occurred during an ABS fault.
Determine if the vehicle was driven on a rough road
Trouble Code: P1380
/EBTCM DTC Detected, Rough Road Data Unusable/
Trouble Code Conditions: DTC P0101-P0103, P0121-P0123, P0335, P0336,
P0742, P1120, P1121, P1220 and P1221 not set, vehicle speed over 10 mph
at an engine speed under 3200 rpm (under 5000 rpm on 3.8L VIN K), engine
load less than 60%, DTC P0300 set with the MIL requested "on", and
Possible Causes:
Service the ABS before diagnosing a misfire because an actual engine
misfire may or may not exist. Also, an actual engine misfire may have
occurred during an ABS fault.
Determine if the vehicle was driven on a rough road
Trouble Code: P1381
/Misfire Detected - No Communication With The EBCM/
Trouble Code Conditions: Engine started, vehicle driven to over 10 mph
at an engine speed under 3200 (5000 rpm on VIN K) at an engine load less
than 60%, Misfire code (DTC P0300) set with MIL requested "on", and the
PCM detected a loss of communication with the EBCM for 20 second
Possible Causes:
Verify with a Scan Tool that the EBCM can transmit serial data on the
Class 2 serial data circuit. Service the EBCM as needed before
diagnosing a misfire because an actual engine misfire may or may not
exist.
Trouble Code: P1381
/Misfire Detected - No Communication With The EBCM/
Trouble Code Conditions: Engine started, vehicle driven to over 10 mph
at an engine speed under 3200 (5000 rpm on VIN K) at an engine load less
than 60%, Misfire code (DTC P0300) set with MIL requested "on", and the
PCM detected a loss of communication with the EBCM for 20 second
Possible Causes:
Verify with a Scan Tool that the EBCM can transmit serial data on the
Class 2 serial data circuit. Service the EBCM as needed before
diagnosing a misfire because an actual engine misfire may or may not
exist.
Trouble Code: P1404
/EGR Valve Closed Position Performance/
Trouble Code Conditions: Engine started; system voltage over 10v, and
the PCM detected the Actual EGR Position was 290 mv above the Desired
EGR Position with the EGR command 0% for 20 seconds.
Possible Causes:
EGR sensor signal circuit is shorted to VREF or system voltage
EGR sensor VREF circuit is shorted to system power
EGR sensor ground circuit is open or has high resistance
EGR sensor is damaged or has failed (sensor/solenoid unit)
EGR valve pintle or valve damage
Trouble Code: P1404
/EGR Valve Closed Position Performance/
Trouble Code Conditions: Engine started; system voltage over 10v, and
the PCM detected the Actual EGR Position was 290 mv above the Desired
EGR Position with the EGR command 0% for 20 seconds.
Possible Causes:
EGR sensor signal circuit is shorted to VREF or system voltage
EGR sensor VREF circuit is shorted to system power
EGR sensor ground circuit is open or has high resistance
EGR sensor is damaged or has failed (sensor/solenoid unit)
EGR valve pintle or valve damage
Trouble Code: P1415
/Secondary Air Injection System (Bank 1) Malfunction/
Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112-P0118,
P0121-P0123, P0131-P0138, P0140, P0141, P0151-P0155, P0171-P0175, P0200,
P0300, P0325, P0327, P0332, P0335-P0336, P0351-P0358, P0430, P0500,
P0502, P0503, P1133, P1134, P1153 and P1154 not set, engine started, e
Possible Causes:
Air hoses disconnected, loose, kinked or failed (a burnt hose)
AIR pump is damaged or has failed (inspect air pump for water)
AIR system check valves and/or pipes are damaged or leaking
PCM has failed
Trouble Code: P1415
/Secondary Air Injection System (Bank 1) Malfunction/
Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112-P0118,
P0121-P0123, P0131-P0138, P0140, P0141, P0151-P0155, P0171-P0175, P0200,
P0300, P0325, P0327, P0332, P0335-P0336, P0351-P0358, P0430, P0500,
P0502, P0503, P1133, P1134, P1153 and P1154 not set, engine started
Possible Causes:
Air hoses disconnected, loose, kinked or failed (a burnt hose)
AIR pump is damaged or has failed (inspect air pump for water)
AIR system check valves and/or pipes are damaged or leaking
PCM has failed
Trouble Code: P1416
/Secondary Air Injection System (Bank 2) Malfunction/
Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112-P0118,
P0121-P0123, P0131-P0138, P0140, P0141, P0151-P0155, P0171-P0175, P0200,
P0300, P0325, P0327, P0332, P0335-P0336, P0351-P0358, P0430, P0500,
P0502, P0503, P1133, P1134, P1153 and P1154 not set, engine started
Possible Causes:
Air hoses disconnected, loose, kinked or failed (a burnt hose)
AIR pump is damaged or has failed (inspect air pump for water)
AIR system check valves and/or pipes are damaged or leaking
PCM has failed
Trouble Code: P1416
/Secondary Air Injection System (Bank 2) Malfunction/
Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112-P0118,
P0121-P0123, P0131-P0138, P0140, P0141, P0151-P0155, P0171-P0175, P0200,
P0300, P0325, P0327, P0332, P0335-P0336, P0351-P0358, P0430, P0500,
P0502, P0503, P1133, P1134, P1153 and P1154 not set, engine started
Possible Causes:
Air hoses disconnected, loose, kinked or failed (a burnt hose)
AIR pump is damaged or has failed (inspect air pump for water)
AIR system check valves and/or pipes are damaged or leaking
PCM has failed
Trouble Code: P1441
/EVAP System Flow During Non-Purge/
Trouble Code Conditions: DTC P0107, P0108, P0112, P0113, P0116, P0117,
P0118, P0125, P0443, P0449, P0452, P0453, P1106, P1107, P1112, P1114,
P1115, P1120, P1220 and P1221, engine started, ECT and IAT sensors from
39-86ºF and within 16ºF at start-up, BARO sensor more than 75 kPa
Possible Causes:
An improperly installed or damaged EVAP canister purge valve
A temporary blockage in the EVAP canister purge valve, purge pipe, or
EVAP canister
FTP sensor is out-of-calibration, damaged or "skewed"
Purge solenoid valve is damaged or has failed
PCM has failed
Trouble Code: P1441
/EVAP System Flow During Non-Purge/
Trouble Code Conditions: DTC P0107, P0108, P0112, P0113, P0116, P0117,
P0118, P0125, P0443, P0449, P0452, P0453, P1106, P1107, P1112, P1114,
P1115, P1120, P1220 and P1221, engine started, ECT and IAT sensors from
39-86ºF and within 16ºF at start-up, BARO sensor more than 75 kPa
Possible Causes:
An improperly installed or damaged EVAP canister purge valve
A temporary blockage in the EVAP canister purge valve, purge pipe, or
EVAP canister
FTP sensor is out-of-calibration, damaged or "skewed"
Purge solenoid valve is damaged or has failed
PCM has failed
Trouble Code: P1518
/Throttle Actuator Control Module Serial Data Malfunction/
Trouble Code Conditions: Key in the crank or run mode, system voltage
over 5.23v, and the ETC or TAC module detected invalid or missing serial
data present for a specified amount of time, condition met for less than
1 second.
Possible Causes:
DTC P1518 sets if the battery voltage is low. If the customer's concern
is slow cranking or no crank due to low battery voltage, ignore the
DTC P1518. Clear codes and retest.
DTC P1518 also sets when there is a short to B+ on the TAC module ground
circuit
Trouble Code: P1518
/Throttle Actuator Control Module Serial Data Malfunction/
Trouble Code Conditions: Key in the crank or run mode, system voltage
over 5.23v, and the ETC or TAC module detected invalid or missing serial
data present for a specified amount of time, condition met for less than
1 second.
Possible Causes:
DTC P1518 sets if the battery voltage is low. If the customer's concern
is slow cranking or no crank due to low battery voltage, ignore the
DTC P1518. Clear codes and retest.
DTC P1518 also sets when there is a short to B+ on the TAC module ground
circuit
Trouble Code: P1539
/Air Conditioning Clutch Status High Input/
Trouble Code Conditions: Engine started; A/C operation "not" requested,
and the PCM detected a voltage signal on the A/C Status circuit for more
than 15 seconds (i.e., with the A/C Clutch relay turned off).
Possible Causes:
A/C clutch status circuit is shorted to system power (B+)
A/C clutch relay is damaged or has failed (contacts are stuck)
PCM has failed
Trouble Code: P1539
/Air Conditioning Clutch Status High Input/
Trouble Code Conditions: Engine started; A/C operation "not" requested,
and the PCM detected a voltage signal on the A/C Status circuit for more
than 15 seconds (i.e., with the A/C Clutch relay turned off).
Possible Causes:
A/C clutch status circuit is shorted to system power (B+)
A/C clutch relay is damaged or has failed (contacts are stuck)
PCM has failed
Trouble Code: P1546
/A/C Clutch Feedback Circuit Low Input/
Trouble Code Conditions: Engine started; A/C requested "on", and the PCM
detected an unexpected low voltage condition on the A/C Clutch Status
circuit for 5 seconds with the A/C clutch enabled.
Possible Causes:
A/C clutch status line is open or shorted to ground
A/C clutch relay is damaged or has failed (contains not closing)
A/C clutch relay power circuit is open (test the HVAC fuse)
PCM has failed
Trouble Code: P1546
/A/C Clutch Feedback Circuit Low Input/
Trouble Code Conditions: Engine started; A/C requested "on", and the PCM
detected an unexpected low voltage condition on the A/C Clutch Status
circuit for 5 seconds with the A/C clutch enabled.
Possible Causes:
A/C clutch status line is open or shorted to ground
A/C clutch relay is damaged or has failed (contains not closing)
A/C clutch relay power circuit is open (test the HVAC fuse)
PCM has failed
Trouble Code: P1626
/Theft Deterrent Fuel Enable Signal Lost/
Trouble Code Conditions: Key on, Vehicle Theft Deterrent (VTD) system
enabled, "fuel enable" decision point reached (engine cranking), and the
VCM could not establish communications with the VTD (Pass Lock) control
module and did not received a valid password before reaching the
Possible Causes:
Check the "fuel enable " circuit for an open, short to ground or short
to system power (B+) condition
Perform the Power-train On-board Diagnostic System Check
BCM or PCM may have failed
Trouble Code: P1626
/Theft Deterrent Fuel Enable Signal Lost/
Trouble Code Conditions: Key on, Vehicle Theft Deterrent (VTD) system
enabled, "fuel enable" decision point reached (engine cranking), and the
VCM could not establish communications with the VTD (Pass Lock) control
module and did not received a valid password before reaching the
Possible Causes:
Check the "fuel enable " circuit for an open, short to ground or short
to system power (B+) condition
Perform the Power-train On-board Diagnostic System Check
BCM or PCM may have failed
Trouble Code: P1635
/5-Volt Reference 1 Circuit Malfunction/
Trouble Code Conditions: Key on or engine running; and the PCM detected
the 5v Reference 1 circuit was out of range for 2 seconds. The 5v VREF 1
circuit is used to provide power to the EGR Pintle Position sensor, MAP
sensor, Engine Oil Pressure sensor and the TP sensor on this ve
Possible Causes:
5v VREF circuit is shorted to sensor ground or chassis ground
5v VREF circuit, TP or MAP sensor circuit is shorted to (B+)
5v VREF circuit shorted to EGR sensor High signal circuit
EGR solenoid valve (and sensor) is damaged or has failed
PCM has failed
Trouble Code: P1635
/5-Volt Reference 1 Circuit Malfunction/
Trouble Code Conditions: Key on or engine running; and the PCM detected
the 5v Reference 1 circuit was out of range for 2 seconds. The 5v VREF 1
circuit is used to provide power to the EGR Pintle Position sensor, MAP
sensor, Engine Oil Pressure sensor and the TP sensor on this ve
Possible Causes:
5v VREF circuit is shorted to sensor ground or chassis ground
5v VREF circuit, TP or MAP sensor circuit is shorted to (B+)
5v VREF circuit shorted to EGR sensor High signal circuit
EGR solenoid valve (and sensor) is damaged or has failed
PCM has failed
Trouble Code: P1637
/Generator 'L' Terminal Circuit Malfunction/
Trouble Code Conditions: Engine started; and the PCM detected that the
'L' terminal was Active with the key on and engine off, or it detected
the 'L' terminal was Inactive with the engine running for 6 seconds. The
L-terminal circuit from the generator is a discrete circuit (no s
Possible Causes:
DTC P1637 and P1638 may set together. The L-terminal circuit can cause
DTC P1638.
A Scan Tool should display Inactive for the 'L' Terminal and 10-40% for
the 'F' Terminal when the ignition is "on".
Trouble Code: P1637
/Generator 'L' Terminal Circuit Malfunction/
Trouble Code Conditions: Engine started; and the PCM detected that the
'L' terminal was Active with the key on and engine off, or it detected
the 'L' terminal was Inactive with the engine running for 6 seconds.
Possible Causes:
DTC P1637 and P1638 may set together. The L-terminal circuit can cause
DTC P1638.
A Scan Tool should display Inactive for the 'L' Terminal and 10-40% for
the 'F' Terminal when the ignition is "on".
Trouble Code: P1638
/Generator 'F' Terminal Circuit Malfunction/
Trouble Code Conditions: No CKP, CMP or Generator codes set, key on and
the PCM detected the PWM signal was from 10-40% for over 6 seconds; or
with the engine speed under 3000 rpm, the PCM detected the PWM signal
was less than 5% for 6 seconds.
Possible Causes:
Generator connector is damaged or has high resistance
Generator field duty cycle signal circuit is open or shorted
Generator is damaged or has failed
PCM has failed
Trouble Code: P1638
/Generator 'F' Terminal Circuit Malfunction/
Trouble Code Conditions: No CKP, CMP or Generator codes set, key on and
the PCM detected the PWM signal was from 10-40% for over 6 seconds; or
with the engine speed under 3000 rpm, the PCM detected the PWM signal
was less than 5% for 6 seconds. The PCM uses the generator field du
Possible Causes:
Generator connector is damaged or has high resistance
Generator field duty cycle signal circuit is open or shorted
Generator is damaged or has failed
PCM has failed
Trouble Code: P1639
/5-Volt Reference 2 Circuit Malfunction/
Trouble Code Conditions: Engine started and the PCM detected the 5v VREF
2 circuit was out of range for 10 seconds. The 5v Reference 2 circuit
connects to the A/C Pressure and Fuel Tank Pressure sensors.
Possible Causes:
A/C refrigerant pressure sensor VREF circuit is open or shorted to ground
A/C refrigerant pressure sensor VREF circuit is shorted to system power
A/C pressure sensor or FTP sensor is damaged or has failed
PCM has failed
Trouble Code: P1639
/5-Volt Reference 2 Circuit Malfunction/
Trouble Code Conditions: Engine started and the PCM detected the 5v VREF
2 circuit was out of range for 10 seconds. The 5v Reference 2 circuit
connects to the A/C Pressure and Fuel Tank Pressure sensors.
Possible Causes:
A/C refrigerant pressure sensor VREF circuit is open or shorted to ground
A/C refrigerant pressure sensor VREF circuit is shorted to system power
A/C pressure sensor or FTP sensor is damaged or has failed
PCM has failed
Trouble Code: P1860
/TCM PWM Solenoid Circuit Malfunction (4L80-E)/
Trouble Code Conditions: Engine run-time over 5 seconds, system voltage
over 10.0v, Fuel Cutoff mode "off", 1st gear commanded "on", and the PCM
detected a high voltage with the TCC solenoid command at 90%, or a low
voltage with the TCC command at 0%. The TCC PWM solenoid controls
Possible Causes:
TCC solenoid control circuit is open, shorted to ground and to power (B+)
TCC solenoid power circuit is open (test the ENG IGN fuse)
TCC solenoid is damaged or has failed
PCM has failed
Trouble Code: P1860
/TCM PWM Solenoid Circuit Malfunction (4L80-E)/
Trouble Code Conditions: Engine run-time over 5 seconds, system voltage
over 10.0v, Fuel Cutoff mode "off", 1st gear commanded "on", and the PCM
detected a high voltage with the TCC solenoid command at 90%, or a low
voltage with the TCC command at 0%. The TCC PWM solenoid controls
Possible Causes:
TCC solenoid control circuit is open, shorted to ground and to power (B+)
TCC solenoid power circuit is open (test the ENG IGN fuse)
TCC solenoid is damaged or has failed
PCM has failed
Trouble Code: P1870
/Trans axle Component Slipping (4T60-E)/
Trouble Code Conditions: DTC P0502, P0503, P0740, P0753, P0758, P0785
and P1860 not set, engine started, vehicle driven to a speed of 30-82 at
an engine speed of 1000-3000 rpm, Fuel Shutoff inactive, TP angle from
8-35%, commanded gear not in 1st gear and the gear range is D4, TF
Possible Causes:
1-2 shift solenoid valve has sediment, damage or leaking seals
2-3 shift solenoid valve has sediment, damage or leaking seals
3-2 shift solenoid valve has sediment, damage or leaking seals
Valve body regulator apply valve stuck or regulator is scored
Trouble Code: P1870
/Trans axle Component Slipping (4T60-E)/
Trouble Code Conditions: DTC P0502, P0503, P0740, P0753, P0758, P0785
and P1860 not set, engine started, vehicle driven to a speed of 30-82 at
an engine speed of 1000-3000 rpm, Fuel Shutoff inactive, TP angle from
8-35%, commanded gear not in 1st gear and the gear range is D4, TF
Possible Causes:
1-2 shift solenoid valve has sediment, damage or leaking seals
2-3 shift solenoid valve has sediment, damage or leaking seals
3-2 shift solenoid valve has sediment, damage or leaking seals
Valve body regulator apply valve stuck or regulator is scored
Trouble Code: U1000
/Class 2 Communication Malfunction/
Trouble Code Conditions: Modules connected to the Class 2 circuit
monitor for serial data communications during normal vehicle operation.
Operating information and commands are exchanged among the modules. When
a module receives a message for a critical operating parameter, the m
Possible Causes:
Class 2 circuit is open, shorted to ground or shorted to power
PCM ignition power circuit(s) has a high resistance condition
PCM main ground circuit(s) has a high resistance condition
SDM (module) could be shorted pulling the voltage low
Trouble Code: U1000
/Class 2 Communication Malfunction/
Trouble Code Conditions: Modules connected to the Class 2 circuit
monitor for serial data communications during normal vehicle operation.
Operating information and commands are exchanged among the modules. When
a module receives a message for a critical operating parameter, the m
Possible Causes:
Class 2 circuit is open, shorted to ground or shorted to power
PCM ignition power circuit(s) has a high resistance condition
PCM main ground circuit(s) has a high resistance condition
SDM (module) could be shorted pulling the voltage low
Trouble Code: U1016
/No Communication With Power-train Control Module/
Trouble Code Conditions: Key on, and a message from a learned ID number
was not detected for the five seconds. Modules on the Class 2 circuit
monitor for data communications during vehicle operation. When a module
receives a message for critical data, the module records the ident
Possible Causes:
PCM Class 2 circuit is open, shorted to ground or to B+
PCM ignition power circuit(s) has a high resistance condition
PCM main ground circuit(s) has a high resistance condition
PCM (module) may have failed and is pulling the circuit low
Trouble Code: U1016
/No Communication With Power-train Control Module/
Trouble Code Conditions: Key on, and a message from a learned ID number
was not detected for the five seconds. Modules on the Class 2 circuit
monitor for data communications during vehicle operation. When a module
receives a message for critical data, the module records the ident
Possible Causes:
PCM Class 2 circuit is open, shorted to ground or to B+
PCM ignition power circuit(s) has a high resistance condition
PCM main ground circuit(s) has a high resistance condition
PCM (module) may have failed and is pulling the circuit low
Trouble Code: U1026
/No Communication With Transfer Case Shift Control Module/
Trouble Code Conditions: Key on, and a message from a learned ID number
was not detected for the five seconds. Modules on the Class 2 circuit
monitor for data communications during vehicle operation. When a module
receives a message for critical data, the module records the ident
Possible Causes:
TCSCM Class 2 circuit is open, shorted to ground or to B+
TCSCM ignition power circuit(s) has a high resistance condition
TCSCM main ground circuit(s) has a high resistance condition
TCSCM (module) may have failed and is pulling the circuit low
Trouble Code: U1026
/No Communication With Transfer Case Shift Control Module/
Trouble Code Conditions: Key on, and a message from a learned ID number
was not detected for the five seconds. Modules on the Class 2 circuit
monitor for data communications during vehicle operation. When a module
receives a message for critical data, the module records the ident
Possible Causes:
TCSCM Class 2 circuit is open, shorted to ground or to B+
TCSCM ignition power circuit(s) has a high resistance condition
TCSCM main ground circuit(s) has a high resistance condition
TCSCM (module) may have failed and is pulling the circuit low
Trouble Code: U1041
/No Communication With Electronic Brake Control Module/
Trouble Code Conditions: Key on, and a message from a learned ID number
was not detected for the five seconds. Modules on the Class 2 circuit
monitor for data communications during vehicle operation. When a module
receives a message for critical data, the module records the ident
Possible Causes:
EBCM Class 2 circuit is open, shorted to ground or to B+
EBCM ignition power circuit(s) has a high resistance condition
EBCM main ground circuit(s) has a high resistance condition
EBCM (module) may have failed and is pulling the circuit low
Trouble Code: U1041
/No Communication With Electronic Brake Control Module/
Trouble Code Conditions: Key on, and a message from a learned ID number
was not detected for the five seconds. Modules on the Class 2 circuit
monitor for data communications during vehicle operation. When a module
receives a message for critical data, the module records the ident
Possible Causes:
EBCM Class 2 circuit is open, shorted to ground or to B+
EBCM ignition power circuit(s) has a high resistance condition
EBCM main ground circuit(s) has a high resistance condition
EBCM (module) may have failed and is pulling the circuit low
Trouble Code: U1048
/No Communication With Rear Wheel Steering Control Module/
Trouble Code Conditions: Key on, and a message from a learned ID number
was not detected for the five seconds. Modules on the Class 2 circuit
monitor for data communications during vehicle operation. When a module
receives a message for critical data, the module records the ident
Possible Causes:
RWSCM Class 2 circuit is open, shorted to ground or to B+
RWSCM ignition power circuit has a high resistance condition
RESCM main ground circuit(s) has a high resistance condition
RESCM (module) may have failed and is pulling the circuit low
Trouble Code: U1048
/No Communication With Rear Wheel Steering Control Module/
Trouble Code Conditions: Key on, and a message from a learned ID number
was not detected for the five seconds. Modules on the Class 2 circuit
monitor for data communications during vehicle operation. When a module
receives a message for critical data, the module records the ident
Possible Causes:
RWSCM Class 2 circuit is open, shorted to ground or to B+
RWSCM ignition power circuit has a high resistance condition
RESCM main ground circuit(s) has a high resistance condition
RESCM (module) may have failed and is pulling the circuit low
Trouble Code: U1064
/No Communication With Body Control Module/
Trouble Code Conditions: Key on, and a message from a learned ID number
was not detected for the five seconds. Modules on the Class 2 circuit
monitor for data communications during vehicle operation. When a module
receives a message for critical data, the module records the ident
Possible Causes:
BCM Class 2 circuit is open, shorted to ground or to B+
BCM ignition power circuit has a high resistance condition
BCM main ground circuit(s) has a high resistance condition
BCM (module) may have failed and is pulling the circuit low
Trouble Code: U1064
/No Communication With Body Control Module/
Trouble Code Conditions: Key on, and a message from a learned ID number
was not detected for the five seconds. Modules on the Class 2 circuit
monitor for data communications during vehicle operation. When a module
receives a message for critical data, the module records the ident
Possible Causes:
BCM Class 2 circuit is open, shorted to ground or to B+
BCM ignition power circuit has a high resistance condition
BCM main ground circuit(s) has a high resistance condition
BCM (module) may have failed and is pulling the circuit low
Trouble Code: U1088
/No Communication With SDM (Restraint Module)/
Trouble Code Conditions: Key on, and a message from a learned ID number
was not detected for the five seconds. Modules on the Class 2 circuit
monitor for data communications during vehicle operation. When a module
receives a message for critical data, the module records the ident
Possible Causes:
SDM Class 2 circuit is open, shorted to ground or to B+
SDM ignition power circuit has a high resistance condition
SDM main ground circuit(s) has a high resistance condition
SDM (module) may have failed and is pulling the circuit low
Trouble Code: U1088
/No Communication With SDM (Restraint Module)/
Trouble Code Conditions: Key on, and a message from a learned ID number
was not detected for the five seconds. Modules on the Class 2 circuit
monitor for data communications during vehicle operation. When a module
receives a message for critical data, the module records the ident
Possible Causes:
SDM Class 2 circuit is open, shorted to ground or to B+
SDM ignition power circuit has a high resistance condition
SDM main ground circuit(s) has a high resistance condition
SDM (module) may have failed and is pulling the circuit low
Trouble Code: U1096
/No Communication With Instrument Panel Cluster/
Trouble Code Conditions: Key on, and a message from a learned ID number
was not detected for the five seconds. Modules on the Class 2 circuit
monitor for data communications during vehicle operation. When a module
receives a message for critical data, the module records the ident
Possible Causes:
IPC Class 2 circuit is open, shorted to ground or to B+
IPC ignition power circuit has a high resistance condition
IPC main ground circuit(s) has a high resistance condition
IPC (module) may have failed and is pulling the circuit low
Trouble Code: U1096
/No Communication With Instrument Panel Cluster/
Trouble Code Conditions: Key on, and a message from a learned ID number
was not detected for the five seconds. Modules on the Class 2 circuit
monitor for data communications during vehicle operation. When a module
receives a message for critical data, the module records the ident
Possible Causes:
IPC Class 2 circuit is open, shorted to ground or to B+
IPC ignition power circuit has a high resistance condition
IPC main ground circuit(s) has a high resistance condition
IPC (module) may have failed and is pulling the circuit low
Trouble Code: U1097
/No Communication With Driver Information Center/
Trouble Code Conditions: Key on, and a message from a learned ID number
was not detected for the five seconds. Modules on the Class 2 circuit
monitor for data communications during vehicle operation. When a module
receives a message for critical data, the module records the ident
Possible Causes:
DIC Class 2 circuit is open, shorted to ground or to B+
DIC ignition power circuit has a high resistance condition
DIC main ground circuit(s) has a high resistance condition
DIC (module) may have failed and is pulling the circuit low
Trouble Code: U1097
/No Communication With Driver Information Center/
Trouble Code Conditions: Key on, and a message from a learned ID number
was not detected for the five seconds. Modules on the Class 2 circuit
monitor for data communications during vehicle operation. When a module
receives a message for critical data, the module records the ident
Possible Causes:
DIC Class 2 circuit is open, shorted to ground or to B+
DIC ignition power circuit has a high resistance condition
DIC main ground circuit(s) has a high resistance condition
DIC (module) may have failed and is pulling the circuit low
Trouble Code: U1151
/No Communication With Vehicle Interface Unit/
Trouble Code Conditions: Key on, and a message from a learned ID number
was not detected for the five seconds. Modules on the Class 2 circuit
monitor for data communications during vehicle operation. When a module
receives a message for critical data, the module records the ident
Possible Causes:
VIU Class 2 circuit is open, shorted to ground or to B+
VIU ignition power circuit has a high resistance condition
VIU main ground circuit(s) has a high resistance condition
VIU (module) may have failed and is pulling the circuit low
Trouble Code: U1151
/No Communication With Vehicle Interface Unit/
Trouble Code Conditions: Key on, and a message from a learned ID number
was not detected for the five seconds. Modules on the Class 2 circuit
monitor for data communications during vehicle operation. When a module
receives a message for critical data, the module records the ident
Possible Causes:
VIU Class 2 circuit is open, shorted to ground or to B+
VIU ignition power circuit has a high resistance condition
VIU main ground circuit(s) has a high resistance condition
VIU (module) may have failed and is pulling the circuit low
Trouble Code: U1152
/No Communication With HVAC Control Module/
Trouble Code Conditions: Key on, and a message from a learned ID number
was not detected for the five seconds. Modules on the Class 2 circuit
monitor for data communications during vehicle operation. When a module
receives a message for critical data, the module records the ident
Possible Causes:
HVAC Class 2 circuit is open, shorted to ground or to B+
HVAC ignition power circuit has a high resistance condition
HVAC main ground circuit(s) has a high resistance condition
HVAC (module) may have failed and is pulling the circuit low
Trouble Code: U1152
/No Communication With HVAC Control Module/
Trouble Code Conditions: Key on, and a message from a learned ID number
was not detected for the five seconds. Modules on the Class 2 circuit
monitor for data communications during vehicle operation. When a module
receives a message for critical data, the module records the ident
Possible Causes:
HVAC Class 2 circuit is open, shorted to ground or to B+
HVAC ignition power circuit has a high resistance condition
HVAC main ground circuit(s) has a high resistance condition
HVAC (module) may have failed and is pulling the circuit low
Trouble Code: U1255
/Class 2 Communications Malfunction/
Trouble Code Conditions: Modules connected to the Class 2 circuit
monitor for serial data communications during normal vehicle operation.
Operating data and commands are exchanged among modules. When a module
receives a message for a critical operating parameter, the module records
Possible Causes:
Class 2 circuit is open, shorted to ground or shorted to power
PCM ignition power circuit(s) has a high resistance condition
PCM main ground circuit(s) has a high resistance condition
Trouble Code: U1255
/Class 2 Communications Malfunction/
Trouble Code Conditions: Modules connected to the Class 2 circuit
monitor for serial data communications during normal vehicle operation.
Operating data and commands are exchanged among modules. When a module
receives a message for a critical operating parameter, the module records
Possible Causes:
Class 2 circuit is open, shorted to ground or shorted to power
PCM ignition power circuit(s) has a high resistance condition
PCM main ground circuit(s) has a high resistance condition
Trouble Code: U1300
/Class 2 Circuit Short to Ground/
Trouble Code Conditions: Key on or engine running; system voltage
supplied to the module is in the normal operating voltage range, vehicle
power mode requires serial data communication to occur, and the PCM did
no detect any valid messages on the Class 2 circuit
Possible Causes:
Class 2 serial data line was in a low state for 3 seconds due to a short
to sensor ground or chassis ground
One or more modules on the Class 2 line has a short to ground
Trouble Code: U1300
/Class 2 Circuit Short to Ground/
Trouble Code Conditions: Key on or engine running; system voltage
supplied to the module is in the normal operating voltage range, vehicle
power mode requires serial data communication to occur, and the PCM did
no detect any valid messages on the Class 2 circuit, or the voltage c
Possible Causes:
Class 2 serial data line was in a low state for 3 seconds due to a short
to sensor ground or chassis ground
One or more modules on the Class 2 line has a short to ground
Trouble Code: U1301
/Class 2 Circuit Short to Battery/
Trouble Code Conditions: Key on or engine running; system voltage
supplied to the module is in the normal operating voltage range, vehicle
power mode requires serial data communication to occur, and the PCM did
no detect any valid messages on the Class 2 circuit, or the voltage c
Possible Causes:
Class 2 serial data line was in a high state for 3 seconds due to a
short to VREF or system power
One or more modules on Class 2 line has an short to power
Trouble Code: U1301
/Class 2 Circuit Short to Battery/
Trouble Code Conditions: Key on or engine running; system voltage
supplied to the module is in the normal operating voltage range, vehicle
power mode requires serial data communication to occur, and the PCM did
no detect any valid messages on the Class 2 circuit, or the voltage c
Possible Causes:
Class 2 serial data line was in a high state for 3 seconds due to a
short to VREF or system power
One or more modules on Class 2 line has an short to power
Trouble Code: U1305
/Class 2 Data Link High or Low/
Trouble Code Conditions: Key on or engine running; system voltage
supplied to the module is in the normal operating voltage range, vehicle
power mode requires serial data communication to occur, and the PCM did
no detect any valid messages on the Class 2 circuit, or the voltage c
Possible Causes:
Class 2 serial data line has either a high or low voltage condition on
the circuit, and the module cannot identify the fault
One or more modules on Class 2 line has an short to power
One or more modules on the Class 2 line has a short to ground
Trouble Code: U1305
/Class 2 Data Link High or Low/
Trouble Code Conditions: Key on or engine running; system voltage
supplied to the module is in the normal operating voltage range, vehicle
power mode requires serial data communication to occur, and the PCM did
no detect any valid messages on the Class 2 circuit, or the voltage c
Possible Causes:
Class 2 serial data line has either a high or low voltage condition on
the circuit, and the module cannot identify the fault
One or more modules on Class 2 line has an short to power
One or more modules on the Class 2 line has a short to ground