OBD-II code · Network
U0194 Lost Communication with Personal Assist Module
The infotainment bus has lost the voice assistant / personal assist module. Voice commands and connected concierge features stop working.
Is it safe to drive with U0194?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyAssist module unpowered or hung
- Less likelyGateway module routing CAN messages incorrectly
- Less likelyCAN terminating resistor (120 Ω) drifted out of spec
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
- 0.3–2 h
- Emissions test
- Usually unaffected
- Parts involved
- Voice Assistant Module, Infotainment Bus
Related codes
- U0191Lost Communication with Television Tuner Module
- U0192Lost Communication with Personal Computer
- U0193Lost Communication with Mobile Phone Module
- U0195Lost Communication with Satellite Radio Receiver Module
- U0196Lost Communication with Rear Seat Entertainment Control Module
- U0197Lost Communication with Hands-Free Phone Control Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.