What does code U049C mean?

Q: What does code U049C mean?

Invalid Data Received From Battery Charger Control Module A. U049C means the module that supervises battery charging (often called the Battery Charger Control Module A) is sending data that other modules on the vehicle network consider invalid or out of range. The computer detected a message from that module that failed its internal plausibility or checksum validation, so it flagged the communication as unreliable rather than missing entirely.

DTC codes / U04xx · Invalid data received from a module / U049C

U049CInvalid Data Received From Battery Charger Control Module A

U049C means the module that supervises battery charging (often called the Battery Charger Control Module A) is sending data that other modules on the vehicle network consider invalid or out of range. The computer detected a message from that module that failed its internal plausibility or checksum validation, so it flagged the communication as unreliable rather than missing entirely.

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.