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.
- P1250Geo · PowertrainEarly Fuel Evaporation Heater Circuit Fault
- P1300Geo · PowertrainIgnition Coil 1 Primary Feedback Circuit
- P1305Geo · PowertrainIgnition Coil 2 Primary Feedback Circuit
- P1310Geo · PowertrainIgnition Coil 3 Primary Feedback Circuit
- P1315Geo · PowertrainIgnition Coil 4 Primary Feedback Circuit
- P1335Geo · PowertrainCrankshaft Position Sensor Circuit
- P1346Geo · PowertrainIntake Camshaft Position System Performance
- P1349Geo · PowertrainIntake Camshaft Position System
- P1408Geo · PowertrainMAP Sensor Circuit
- P1410Geo · PowertrainFuel Tank Pressure System Fault
- P1450Geo · PowertrainBarometric Pressure Sensor Circuit Fault
- P1451Geo · PowertrainBarometric Pressure Sensor Performance
- P1460Geo · PowertrainCooling Fan Control System Fault
- P1500Geo · PowertrainStarter Signal Circuit Fault
- P1510Geo · PowertrainBackup Power Supply Fault
- P1520Geo · PowertrainStop Lamp Switch Circuit
- P1530Geo · PowertrainIgnition Timing Adjustment Switch Circuit
- P1600Geo · PowertrainPCM Battery Circuit Fault
- P1656Geo · PowertrainIntake CMP Actuator Solenoid Control Circuit