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.
- P1874Oldsmobile · PowertrainTCC Stator Temp Switch Circuit High
- P1875Oldsmobile · Powertrain4WD Low Switch Circuit
- P1884Oldsmobile · PowertrainTCC Enable Shift Light Circuit
- P1886Oldsmobile · PowertrainShift Timing Solenoid
- P1887Oldsmobile · PowertrainTCC Release Switch Circuit
- P1890Oldsmobile · PowertrainECM Data Input Circuit
- P1891Oldsmobile · PowertrainThrottle Position Sensor PWM Signal Low
- P1892Oldsmobile · PowertrainThrottle Position Sensor PWM Signal High
- P1893Oldsmobile · PowertrainEngine Torque Signal Low Voltage
- P1894Oldsmobile · PowertrainEngine Torque Signal High Voltage
- P1895Oldsmobile · PowertrainTCM To ECM Torque Reduction Circuit