OBD-II code · Network
U05B9 Invalid Data Received From Rear Radar Module C
A receiving module detected implausible data from rear radar module C. Distance/azimuth values fail plausibility checks and are rejected; blind-spot warning and rear cross-traffic alert are inhibited.
Is it safe to drive with U05B9?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyModule internal fault or sensor input drift
- PossibleSoftware version mismatch after replacement
- Less likelyGateway module routing CAN messages incorrectly
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
Related codes
- U05B7Invalid Data Received From Rear Radar Module A
- U05B8Invalid Data Received From Rear Radar Module B
- U05BAInvalid Data Received From Rear Radar Module D
- U05B6Invalid Data Received From Front Radar Module B
- U05BDInvalid Data Received From Localization and Mapping Module
- U05BEInvalid Data Received From Night Vision Control Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.