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.
- U0228Generic · NetworkLost Communication With Door Window Motor G
- U0229Generic · NetworkLost Communication With Heated Steering Wheel Module
- U022EGeneric · NetworkLost Communication With Object Detection Maintenance Control Module A
- U022FGeneric · NetworkLost Communication With Object Detection Maintenance Control Module B
- U0230Generic · NetworkLost Communication With Rear Gate Module
- U0231Generic · NetworkLost Communication With Rain Sensing Module
- U0232Generic · NetworkLost Communication With Side Obstacle Detection Control Module A
- U0233Generic · NetworkLost Communication With Side Obstacle Detection Control Module B
- U0234Generic · NetworkLost Communication With Convenience Recall Module
- U0235Generic · NetworkLost Communication With Front Distance Range Sensor - Single Sensor or Center
- U0236Generic · NetworkLost Communication With Column Lock Module
- U0237Generic · NetworkLost Communication With Digital Audio Control Module C
- U0238Generic · NetworkLost Communication With Digital Audio Control Module D
- U0239Generic · NetworkLost Communication With Entrapment Control Module A
- U023AGeneric · NetworkLost Communication With Image Processing Module A
- U023BGeneric · NetworkLost Communication With Image Processing Module B
- U023CGeneric · NetworkLost Communication With Image Processing Module C
- U023DGeneric · NetworkLost Communication With Front Distance Range Sensor - Left
- U023EGeneric · NetworkLost Communication With Front Distance Range Sensor - Right
- U0240Generic · NetworkLost Communication With Entrapment Control Module B
- U0241Generic · NetworkLost Communication With Headlamp Control Module A
- U0242Generic · NetworkLost Communication With Headlamp Control Module B
- U0243Generic · NetworkLost Communication With Parking Assist Control Module B
- U0244Generic · NetworkLost Communication With Running Board Control Module A
- U0245Generic · NetworkLost Communication With Entertainment Control Module - Front
- U0246Generic · NetworkLost Communication With Seat Control Module E
- U0247Generic · NetworkLost Communication With Seat Control Module F
- U0248Generic · NetworkLost Communication With Remote Accessory Module
- U0249Generic · NetworkLost Communication With Entertainment Control Module - Rear B
- U024AGeneric · NetworkLost Communication With Interior Lighting Control Module A