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.
- P1529GM · PowertrainHeated Windshield Request Problem
- P1529GMC · PowertrainHeated Windshield Request Problem
- P1529Oldsmobile · PowertrainHeated Windshield Request Problem
- P1529Other · PowertrainSCAIR Solenoid Circuit Malfunction
- P1529Saturn · PowertrainHeated Windshield Request Problem
- P1529Volkswagen · PowertrainIntake Camshaft Control Circuit Short To B+
- P1530BMW · PowertrainB Camshaft Position Actuator Control Circuit Signal High Bank 1
- P1530Buick · PowertrainIgnition Timing Adjustment Switch Circuit
- P1530Cadillac · PowertrainIgnition Timing Adjustment Switch Circuit
- P1530Chevrolet · PowertrainIgnition Timing Adjustment Switch Circuit
- P1530Chrysler · PowertrainIgnition Timing Adjustment Switch Circuit
- P1530Ford · PowertrainOpen or Short to A/C Compressor Clutch Circuit
- P1530Geo · PowertrainIgnition Timing Adjustment Switch Circuit
- P1530GM · PowertrainIgnition Timing Adjustment Switch Circuit
- P1530GMC · PowertrainIgnition Timing Adjustment Switch Circuit
- P1530Lincoln · PowertrainOpen or Short to A/C Compressor Clutch Circuit
- P1530Mercury · PowertrainOpen or Short to A/C Compressor Clutch Circuit
- P1530Oldsmobile · PowertrainIgnition Timing Adjustment Switch Circuit
- P1530Other · PowertrainA/C Clutch Circuit Malfunction
- P1530Saturn · PowertrainIgnition Timing Adjustment Switch Circuit
- P1530Suzuki · PowertrainIgnition Timing Adjustment Switch Circuit Fault
- P1530Volkswagen · PowertrainIntake Camshaft Control Circuit Short To Ground
- P1531BMW · PowertrainB Camshaft Position Actuator Control Open Circuit Bank 1
- P1531Buick · PowertrainA/C Low Side Temerature Sensor Fault
- P1531Cadillac · PowertrainA/C Low Side Temperature Sensor Fault
- P1531Chevrolet · PowertrainA/C Low Side Temperature Sensor Fault
- P1531Chrysler · PowertrainA/C Low Side Temperature Sensor Fault
- P1531Ford · PowertrainInvalid Test Accelerator Pedal Movement
- P1531GM · PowertrainA/C Low Side Temerature Sensor Fault
- P1531GMC · PowertrainA/C Low Side Temerature Sensor Fault