OBD-II code · Network
U02B8 Lost Communication With Rear Radar Module C
The vehicle bus reports loss of communication with rear radar module C. Blind-spot warning, lane-change assist and rear cross-traffic alert dependent on this sensor are inhibited.
Is it safe to drive with U02B8?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyBus wiring open or shorted
- PossibleModule without power or ground
- PossibleModule failed
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–3 h
- Emissions test
- Usually unaffected
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Rear Radar Module C, Vehicle Bus Wiring
Related codes
- U02B6Lost Communication With Rear Radar Module A
- U02B7Lost Communication With Rear Radar Module B
- U02B9Lost Communication With Rear Radar Module D
- U02B5Lost Communication With Front Radar Module B
- U02BALost Communication With Hybrid/EV Electronics Coolant Pump B
- U02BBLost Communication With EVAP System Purge Pump
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.