OBD-II code · Network
U05B4 Invalid Data Received From Driver Monitoring System Module
A receiving module detected implausible data from the driver monitoring system (DMS) module. Eye/head-pose tracking values fail plausibility checks and are rejected; ADAS handover features may be inhibited.
Is it safe to drive with U05B4?
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
- Driver Monitoring Module
Related codes
- U05ACInvalid Data Received From Vehicle Thermal Management Control Module
- U05B2Invalid Data Received From Comfort and Convenience Display A
- U05B3Invalid Data Received From Comfort and Convenience Display B
- U05B5Invalid Data Received From Front Radar Module A
- U05B6Invalid Data Received From Front Radar Module B
- U05B7Invalid Data Received From Rear Radar Module A
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.