Powertrain fault codes
14821 Powertrain OBD-II fault codes: what each one means, 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.
- P1891Oldsmobile · PowertrainThrottle Position Sensor PWM Signal Low
- P1891Other · PowertrainTransmission Transfer Case Contact Plate Ground Return Open Circuit
- P1891Saturn · PowertrainThrottle Position Sensor PWM Signal Low
- P1892Buick · PowertrainThrottle Position Sensor PWM Signal High
- P1892Cadillac · PowertrainThrottle Position Sensor PWM Signal High
- P1892Chevrolet · PowertrainThrottle Position Sensor PWM Signal High
- P1892GM · PowertrainThrottle Position Sensor PWM Signal High
- P1892GMC · PowertrainThrottle Position Sensor PWM Signal High
- P1892Oldsmobile · PowertrainThrottle Position Sensor PWM Signal High
- P1892Saturn · PowertrainThrottle Position Sensor PWM Signal High
- P1893Buick · PowertrainEngine Torque Signal Low Voltage
- P1893Cadillac · PowertrainEngine Torque Signal Low Voltage
- P1893Chevrolet · PowertrainEngine Torque Signal Low Voltage
- P1893GM · PowertrainEngine Torque Signal Low Voltage
- P1893GMC · PowertrainEngine Torque Signal Low Voltage
- P1893Oldsmobile · PowertrainEngine Torque Signal Low Voltage
- P1893Saturn · PowertrainEngine Torque Signal Low Voltage
- P1894Buick · PowertrainEngine Torque Signal High Voltage
- P1894Cadillac · PowertrainEngine Torque Signal High Voltage
- P1894Chevrolet · PowertrainEngine Torque Signal High Voltage
- P1894GM · PowertrainEngine Torque Signal High Voltage
- P1894GMC · PowertrainEngine Torque Signal High Voltage
- P1894Oldsmobile · PowertrainEngine Torque Signal High Voltage
- P1894Saturn · PowertrainEngine Torque Signal High Voltage
- P1895Buick · PowertrainTCM To ECM Torque Reduction Circuit
- P1895Cadillac · PowertrainTCM To ECM Torque Reduction Circuit
- P1895Chevrolet · PowertrainTCM To ECM Torque Reduction Circuit
- P1895GM · PowertrainTCM To ECM Torque Reduction Circuit
- P1895GMC · PowertrainTCM To ECM Torque Reduction Circuit
- P1895Oldsmobile · PowertrainTCM To ECM Torque Reduction Circuit