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.
- P1565Toyota · PowertrainCruise Control Main Switch Circuit
- P1600Toyota · PowertrainECM BATT Malfunction
- P1605Toyota · PowertrainKnock Control CPU
- P1630Toyota · PowertrainTraction Control System
- P1633Toyota · PowertrainECM
- P1652Toyota · PowertrainIdle Air Control Valve Control Circuit
- P1656Toyota · PowertrainOCV Circuit
- P1658Toyota · PowertrainWastegate Valve Control Circuit
- P1661Toyota · PowertrainEGR Circuit
- P1662Toyota · PowertrainEGR Bypass Valve Control Circuit
- P1700Toyota · PowertrainVehicle Speed Sensor 2 Circuit Fault
- P1705Toyota · PowertrainDirect Clutch Speed Circuit Fault
- P1765Toyota · PowertrainLinear Shift Solenoid Circuit Fault
- P1780Toyota · PowertrainPark Neutral Position Switch Malfunction Only For A/T
- P1895Toyota · PowertrainTCM To ECM Torque Reduction Circuit Malfunction