What does code U0431 mean?

Q: What does code U0431 mean?

Invalid Data Received From Body Control Module 'A'. U0431 means the module that coordinates communication between your car's computers has received invalid or missing data from the body control module 'A', which manages body functions like lights, locks, and wipers. The computer detected a fault in the data stream from that module, not necessarily a failure of the module itself.

DTC codes / U04xx · Invalid data received from a module / U0431

U0431Invalid Data Received From Body Control Module 'A'

U0431 means the module that coordinates communication between your car's computers has received invalid or missing data from the body control module 'A', which manages body functions like lights, locks, and wipers. The computer detected a fault in the data stream from that module, not necessarily a failure of the module itself.

SystemNetwork

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaInvalid data received from a module

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.