What does code U04B5 mean?

Q: What does code U04B5 mean?

Invalid Data Received From Brake System Control Module B. U04B5 means the vehicle's network gateway or a control module has lost the ability to receive valid data from Brake System Control Module B, which is a secondary electronic brake control unit on vehicles that use more than one brake module. The computer detects this when messages from that module are missing, corrupted, or fail their checksum over the controller area network (CAN) bus for a set number of drive cycles.

DTC codes / U04xx · Invalid data received from a module / U04B5

U04B5Invalid Data Received From Brake System Control Module B

U04B5 means the vehicle's network gateway or a control module has lost the ability to receive valid data from Brake System Control Module B, which is a secondary electronic brake control unit on vehicles that use more than one brake module. The computer detects this when messages from that module are missing, corrupted, or fail their checksum over the controller area network (CAN) bus for a set number of drive cycles.

SystemNetwork

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyProfessional

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.