Generic fault codes
9415 Generic 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.
- U008AGeneric · NetworkVehicle Communication Bus G Performance
- U008BGeneric · NetworkVehicle Communication Bus G (+) Open
- U008CGeneric · NetworkVehicle Communication Bus G (+) Low
- U008DGeneric · NetworkVehicle Communication Bus G (+) High
- U008EGeneric · NetworkVehicle Communication Bus G (-) Open
- U008FGeneric · NetworkVehicle Communication Bus G (-) Low
- U0090Generic · NetworkVehicle Communication Bus G (-) High
- U0091Generic · NetworkVehicle Communication Bus G (-) shorted to Bus G (+)
- U0092Generic · NetworkVehicle Communication Bus H
- U0093Generic · NetworkVehicle Communication Bus H Performance
- U0094Generic · NetworkVehicle Communication Bus H (+) Open
- U0095Generic · NetworkVehicle Communication Bus H (+) Low
- U0096Generic · NetworkVehicle Communication Bus H (+) High
- U0097Generic · NetworkVehicle Communication Bus H (-) Open
- U0098Generic · NetworkVehicle Communication Bus H (-) Low
- U0099Generic · NetworkVehicle Communication Bus H (-) High
- U009AGeneric · NetworkVehicle Communication Bus H (-) shorted to Bus H (+)
- U009BGeneric · NetworkVehicle Communication Bus I
- U009CGeneric · NetworkVehicle Communication Bus I Performance
- U009DGeneric · NetworkVehicle Communication Bus J
- U009EGeneric · NetworkVehicle Communication Bus J Performance
- U0100Generic · NetworkLost Communication With ECM/PCM A
- U0101Generic · NetworkLost Communication With TCM
- U0102Generic · NetworkLost Communication With Transfer Case Control Module
- U0103Generic · NetworkLost Communication With Gear Shift Control Module A
- U0104Generic · NetworkLost Communication With Cruise Control Module
- U0105Generic · NetworkLost Communication With Fuel Injector Control Module
- U0106Generic · NetworkLost Communication With Glow Plug Control Module 1
- U0107Generic · NetworkLost Communication With Throttle Actuator A Control Module
- U0108Generic · NetworkLost Communication With Alternative Fuel Control Module