What does code U05B9 mean?

Q: What does code U05B9 mean?

Invalid Data Received From Rear Radar Module C. U05B9 is a communication fault indicating that the rear radar module C is sending data that other modules on the controller area network (CAN) bus consider invalid or corrupted. The vehicle's computers have detected a mismatch between expected and received sensor information, often due to a faulty module, wiring issue, or software glitch.

DTC codes / U05xx · Network communication / U05B9

U05B9Invalid Data Received From Rear Radar Module C

U05B9 is a communication fault indicating that the rear radar module C is sending data that other modules on the controller area network (CAN) bus consider invalid or corrupted. The vehicle's computers have detected a mismatch between expected and received sensor information, often due to a faulty module, wiring issue, or software glitch.

SystemNetwork

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaNetwork communication

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