BMW fault codes
250 BMW 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.
- P1746BMW · PowertrainTransmission Control Module Output Stage
- P1747BMW · PowertrainCAN Bus Monitoring
- P1748BMW · PowertrainTransmission Control Module Self Test
- P1749BMW · PowertrainSecondary Pressure Solenoid Communication Error
- P1750BMW · PowertrainSecondary Pressure Solenoid Circuit Range Performance
- P1751BMW · PowertrainSecondary Pressure Solenoid Open Circuit
- P1761BMW · PowertrainShift Solenoid Malfunction
- P1765BMW · PowertrainCAN Throttle Valve
- P1770BMW · PowertrainCAN Torque Interface
- P1780BMW · PowertrainCAN Torque Reduction