What does code U0484 mean?

Q: What does code U0484 mean?

Invalid Data Received From Lighting Control Module - Rear A. U0484 is a communication fault where the module that coordinates your vehicle's network receives invalid or corrupted data from the rear lighting control module, designated 'A'. The computer detected a message from that module that failed its internal data integrity checks, so it cannot trust the information being sent about the rear lights.

DTC codes / U04xx · Invalid data received from a module / U0484

U0484Invalid Data Received From Lighting Control Module - Rear A

U0484 is a communication fault where the module that coordinates your vehicle's network receives invalid or corrupted data from the rear lighting control module, designated 'A'. The computer detected a message from that module that failed its internal data integrity checks, so it cannot trust the information being sent about the rear lights.

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.