OBD-II code · Network
U0197 Lost Communication with Hands-Free Phone Control Module
The infotainment system cannot reach the hands-free phone controller. Bluetooth telephony, address book sync and emergency call features may be unavailable.
Is it safe to drive with U0197?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyHands-free module unpowered
- 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
- Hands Free Module, Infotainment Bus
Related codes
- U0194Lost Communication with Personal Assist Module
- U0195Lost Communication with Satellite Radio Receiver Module
- U0196Lost Communication with Rear Seat Entertainment Control Module
- U0198Lost Communication with Telematic Control Module
- U0199Lost Communication with Door Control Module
- U019ALost Communication With Tachograph Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.