GMC fault codes
402 GMC OBD-II fault codes: what each one means, and how to track it down.
How to read a code
- P
- SystemPowertrain
- 0
- Defined bySAE, the same on every car
- 4
- AreaAuxiliary emission controls
- 20
- FaultThe specific fault in that area
Read the code
Note every stored and pending code your scanner shows, such as P0420.
Find it
Search by code or by words. For a manufacturer code (P1, B1, C1, U1) pick your make: its meaning differs by make.
Open the code
Its page explains the symptoms, likely causes, the checks to run and the fixes.
- P1509GMC · PowertrainIAC System High RPM
- P1510GMC · PowertrainBack UP Power Supply
- P1511GMC · PowertrainThrottle Control System Backup System Performance
- P1514GMC · PowertrainThrottle Body Performance
- P1515GMC · PowertrainControl Module Throttle Actuator Position Performance
- P1516GMC · PowertrainThrottle Actuator Control (TAC) Module Throttle Actuator Position Performance
- P1517GMC · PowertrainThrottle Actuator Control (TAC) Module Performance
- P1518GMC · PowertrainThrottle Actuator Control (TAC) Module Serial Data Circuit
- P1519GMC · PowertrainElectronic Throttle Module Low Volts Communication Disable
- P1520GMC · PowertrainGear Indicator System
- P1521GMC · PowertrainTransmission Engaged At High Throttle Angle
- P1522GMC · PowertrainPark Neutral To Drive Reverse At High RPM
- P1523GMC · PowertrainElectronic Throttle Control Throttle Return
- P1524GMC · PowertrainTP Sensor Learned CI Throttle Angle Out Of Range
- P1525GMC · PowertrainThrottle Body Service Required
- P1526GMC · PowertrainTP Sensor Learn Not Complete
- P1527GMC · PowertrainTransmission Range Pressure Switch Comparison
- P1528GMC · PowertrainGovernor
- P1529GMC · PowertrainHeated Windshield Request Problem
- P1530GMC · PowertrainIgnition Timing Adjustment Switch Circuit
- P1531GMC · PowertrainA/C Low Side Temerature Sensor Fault
- P1532GMC · PowertrainA/C Evaporator Temperature Sensor Circuit Low Voltage
- P1533GMC · PowertrainA/C Evaporator Temperature Sensor Circuit High Voltage
- P1534GMC · PowertrainA/C High Side Temperature Sensor Low Voltage
- P1535GMC · PowertrainA/C High Side Temperature Sensor Circuit
- P1536GMC · PowertrainA/C System ECT Overtemperature
- P1537GMC · PowertrainA/C Request Circuit Low Voltage
- P1538GMC · PowertrainA/C Request Circuit High Voltage
- P1539GMC · PowertrainAir Conditioning (A/C) Clutch Feedback Circuit High Voltage
- P1540GMC · PowertrainA/C System High Pressure