OBD-II code · Network
U0188 Lost Communication with Audio Rear Control Module
The Audio Rear Control Module has stopped transmitting on the vehicle data bus, so other control units no longer receive its messages. Rear-seat audio controls stop 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 U0188?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyRear audio module unpowered
- PossibleCAN wiring to rear audio 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 h
- Emissions test
- Usually unaffected
- Parts involved
- Audio Rear Control Module, Can Bus Wiring
Related codes
- U0185Lost Communication with Antenna Control Module
- U0186Lost Communication with Audio Amplifier
- U0187Lost Communication with Disc Player Module
- U0189Lost Communication with Auxiliary Heater Control Module
- U018ALost Communication With Headlamp Leveling Control Module B
- U0190Lost Communication with Subwoofer Amplifier Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.