OBD-II code · Network
U0193 Lost Communication with Mobile Phone Module
The Mobile Phone Module has stopped transmitting on the vehicle data bus, so other control units no longer receive its messages. Hands-free phone integration stops working. Typical causes are loss of power or ground at the module, an open or shorted CAN/LIN bus wire, a connector fault, or an internal module failure.
Is it safe to drive with U0193?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyPhone module unpowered
- PossibleCAN wiring to phone module broken
- 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
- 0.5–2.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Mobile Phone Module, Can Bus Wiring
Related codes
- U0190Lost Communication with Subwoofer Amplifier Module
- U0191Lost Communication with Television Tuner Module
- U0192Lost Communication with Personal Computer
- U0194Lost Communication with Personal Assist Module
- U0195Lost Communication with Satellite Radio Receiver Module
- U0196Lost Communication with Rear Seat Entertainment Control Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.