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.
- P1278Oldsmobile · PowertrainAccelerator Pedal Position Sensor 1 Circuit High Voltage
- P1280Oldsmobile · PowertrainAccelerator Pedal Position APP Sensor 2 Circuit
- P1281Oldsmobile · PowertrainAccelerator Pedal Position APP Sensor 2 Performance
- P1282Oldsmobile · PowertrainAccelerator Pedal Position Sensor 2 Circuit Low Voltage
- P1283Oldsmobile · PowertrainAccelerator Pedal Position Sensor 2 Circuit High Voltage
- P1285Oldsmobile · PowertrainAccelerator Pedal Position APP Sensor 3 Circuit
- P1286Oldsmobile · PowertrainAccelerator Pedal Position APP Sensor 3 Performance
- P1287Oldsmobile · PowertrainAccelerator Pedal Position Sensor 3 Circuit Low Voltage
- P1288Oldsmobile · PowertrainAccelerator Pedal Position Sensor 3 Circuit High Voltage
- P1300Oldsmobile · PowertrainIgnitor Circuit
- P1305Oldsmobile · PowertrainIgnition Coil 2 Primary Feedback Circuit
- P1310Oldsmobile · PowertrainIgnition Coil 3 Primary Feedback Circuit
- P1315Oldsmobile · PowertrainIgnition Coil 4 Primary Feedback Circuit
- P1320Oldsmobile · PowertrainIC Module 4X Ref Circuit Intermittent No Pulses
- P1321Oldsmobile · PowertrainElectronic Ignition System Fault Line
- P1322Oldsmobile · PowertrainEI System Or Ignition Control Missing
- P1323Oldsmobile · Powertrain24X Reference Circuit Low Frequency
- P1324Oldsmobile · PowertrainCrank RPM Too Low
- P1335Oldsmobile · PowertrainCKP Circuit
- P1336Oldsmobile · PowertrainCrankshaft Position CKP System Variation Not Learned
- P1345Oldsmobile · PowertrainCKP CMP Correlation
- P1346Oldsmobile · PowertrainIntake Camshaft Position CMP Sensor System Performance
- P1350Oldsmobile · PowertrainIgnition Control System
- P1351Oldsmobile · PowertrainIC Circuit High Voltage
- P1352Oldsmobile · PowertrainIC Output High Pulse Detected When Grounded Cyl 2
- P1353Oldsmobile · PowertrainIC Output High Pulse Detected When Grounded Cyl 3
- P1354Oldsmobile · PowertrainIC Output High Pulse Detected When Grounded Cyl 4
- P1355Oldsmobile · PowertrainIC Output High Pulse Detected When Grounded Cyl 5
- P1356Oldsmobile · PowertrainIC Output High Pulse Detected When Grounded Cyl 6
- P1357Oldsmobile · PowertrainIC Output High Pulse Detected When Grounded Cyl 7