What does code U02B8 mean?

Q: What does code U02B8 mean?

Lost Communication With Rear Radar Module C. This code means the vehicle's main communication network has stopped receiving regular status messages from the rear radar module labeled C, which is typically one of the sensors used for blind spot monitoring or rear cross-traffic alert. The computer detected that the module's periodic heartbeat messages on the Controller Area Network (CAN) bus have timed out or disappeared entirely.

DTC codes / U02xx · Lost communication with a control module / U02B8

U02B8Lost Communication With Rear Radar Module C

This code means the vehicle's main communication network has stopped receiving regular status messages from the rear radar module labeled C, which is typically one of the sensors used for blind spot monitoring or rear cross-traffic alert. The computer detected that the module's periodic heartbeat messages on the Controller Area Network (CAN) bus have timed out or disappeared entirely.

SystemNetwork

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaLost communication with a control 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.