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.
- U024BGeneric · NetworkLost Communication With Seat Control Module G
- U024CGeneric · NetworkLost Communication With Seat Control Module H
- U024DGeneric · NetworkLost Communication With Seat Control Module J
- U024EGeneric · NetworkLost Communication With Side Obstacle Detection Control Module C
- U024FGeneric · NetworkLost Communication With Side Obstacle Detection Control Module D
- U0250Generic · NetworkLost Communication With Impact Classification System Module
- U0251Generic · NetworkLost Communication With Running Board Control Module B
- U0252Generic · NetworkLost Communication With Lighting Control Module - Rear B
- U0253Generic · NetworkLost Communication With Accessory Protocol Interface Module
- U0254Generic · NetworkLost Communication With Remote Start Module
- U0255Generic · NetworkLost Communication With Front Display Interface Module
- U0256Generic · NetworkLost Communication With Front Controls Interface Module A
- U0257Generic · NetworkLost Communication With Front Controls/Display Interface Module
- U0258Generic · NetworkLost Communication With Radio Transceiver
- U0259Generic · NetworkLost Communication With Special Purpose Vehicle Control Module A
- U025AGeneric · NetworkLost Communication With Special Purpose Vehicle Control Module B
- U025BGeneric · NetworkLost Communication With Special Purpose Vehicle Control Module C
- U025CGeneric · NetworkLost Communication With Special Purpose Vehicle Control Module D
- U025DGeneric · NetworkLost Communication With Front Controls Interface Module B
- U025EGeneric · NetworkLost Communication With Electronic Brake Booster Control Module A
- U025FGeneric · NetworkLost Communication With Electronic Brake Booster Control Module B
- U0260Generic · NetworkLost Communication With Seat Control Switch Module A
- U0261Generic · NetworkLost Communication With Seat Control Switch Module B
- U0262Generic · NetworkLost Communication With Audio Amplifier B
- U0263Generic · NetworkLost Communication With Speech Recognition Module
- U0264Generic · NetworkLost Communication With Camera Module - Rear
- U0265Generic · NetworkLost Communication With Image Processing Sensor A
- U0266Generic · NetworkLost Communication With Image Processing Sensor B
- U0267Generic · NetworkLost Communication With Image Processing Sensor C
- U0268Generic · NetworkLost Communication With Image Processing Sensor D