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.
- P1278GMC · PowertrainAccelerator Pedal Position Sensor 1 Circuit High Voltage
- P1280GMC · PowertrainAccelerator Pedal Position (APP) Sensor 2 Circuit
- P1281GMC · PowertrainAccelerator Pedal Position (APP) Sensor 2 Performance
- P1282GMC · PowertrainAccelerator Pedal Position Sensor 2 Circuit Low Voltage
- P1283GMC · PowertrainAccelerator Pedal Position Sensor 2 Circuit High Voltage
- P1285GMC · PowertrainAccelerator Pedal Position (APP) Sensor 3 Circuit
- P1286GMC · PowertrainAccelerator Pedal Position (APP) Sensor 3 Performance
- P1287GMC · PowertrainAccelerator Pedal Position Sensor 3 Circuit Low Voltage
- P1288GMC · PowertrainAccelerator Pedal Position Sensor 3 Circuit High Voltage
- P1300GMC · PowertrainIgnitor Circuit
- P1305GMC · PowertrainIgnition Coil 2 Primary Feedback Circuit
- P1310GMC · PowertrainIgnition Coil 3 Primary Feedback Circuit
- P1315GMC · PowertrainIgnition Coil 4 Primary Feedback Circuit
- P1320GMC · PowertrainIC Module 4X Ref Circuit Intermittent No Pulses
- P1321GMC · PowertrainElectronic Ignition System Fault Line
- P1322GMC · PowertrainEI System Or Ignition Control Missing
- P1323GMC · Powertrain24X Reference Circuit Low Frequency
- P1324GMC · PowertrainCrank RPM Too Low
- P1335GMC · PowertrainCKP Circuit
- P1336GMC · PowertrainCrankshaft Position (CKP) System Variation Not Learned
- P1345GMC · PowertrainCKP/CMP Correlation
- P1346GMC · PowertrainIntake Camshaft Position (CMP) Sensor System Performance
- P1350GMC · PowertrainIgnition Control System
- P1351GMC · PowertrainIC Circuit High Voltage
- P1352GMC · PowertrainIC Output High Pulse Detected When Grounded Cyl 2
- P1353GMC · PowertrainIC Output High Pulse Detected When Grounded Cyl 3
- P1354GMC · PowertrainIC Output High Pulse Detected When Grounded Cyl 4
- P1355GMC · PowertrainIC Output High Pulse Detected When Grounded Cyl 5
- P1356GMC · PowertrainIC Output High Pulse Detected When Grounded Cyl 6
- P1357GMC · PowertrainIC Output High Pulse Detected When Grounded Cyl 7