DTC codes
Look up an OBD-II fault code: what it means on every car or on your make, 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.
- P1278GM · PowertrainAccelerator Pedal Position Sensor 1 Circuit High Voltage
- P1280GM · PowertrainAccelerator Pedal Position (APP) Sensor 2 Circuit
- P1281GM · PowertrainAccelerator Pedal Position (APP) Sensor 2 Performance
- P1282GM · PowertrainAccelerator Pedal Position Sensor 2 Circuit Low Voltage
- P1283GM · PowertrainAccelerator Pedal Position Sensor 2 Circuit High Voltage
- P1285GM · PowertrainAccelerator Pedal Position (APP) Sensor 3 Circuit
- P1286GM · PowertrainAccelerator Pedal Position (APP) Sensor 3 Performance
- P1287GM · PowertrainAccelerator Pedal Position Sensor 3 Circuit Low Voltage
- P1288GM · PowertrainAccelerator Pedal Position Sensor 3 Circuit High Voltage
- P1300GM · PowertrainIgnitor Circuit
- P1305GM · PowertrainIgnition Coil 2 Primary Feedback Circuit
- P1310GM · PowertrainIgnition Coil 3 Primary Feedback Circuit
- P1315GM · PowertrainIgnition Coil 4 Primary Feedback Circuit
- P1320GM · PowertrainIC Module 4X Ref Circuit Intermittent No Pulses
- P1321GM · PowertrainElectronic Ignition System Fault Line
- P1322GM · PowertrainEI System Or Ignition Control Missing
- P1323GM · Powertrain24X Reference Circuit Low Frequency
- P1324GM · PowertrainCrank RPM Too Low
- P1335GM · PowertrainCKP Circuit
- P1336GM · PowertrainCrankshaft Position (CKP) System Variation Not Learned
- P1345GM · PowertrainCKP/CMP Correlation
- P1346GM · PowertrainIntake Camshaft Position (CMP) Sensor System Performance
- P1350GM · PowertrainIgnition Control System
- P1351GM · PowertrainIC Circuit High Voltage
- P1352GM · PowertrainIC Output High Pulse Detected When Grounded Cyl 2
- P1353GM · PowertrainIC Output High Pulse Detected When Grounded Cyl 3
- P1354GM · PowertrainIC Output High Pulse Detected When Grounded Cyl 4
- P1355GM · PowertrainIC Output High Pulse Detected When Grounded Cyl 5
- P1356GM · PowertrainIC Output High Pulse Detected When Grounded Cyl 6
- P1357GM · PowertrainIC Output High Pulse Detected When Grounded Cyl 7