OBD-II code · Network
U0184 Lost Communication with Radio
The Radio has stopped transmitting on the vehicle data bus, so other control units no longer receive its messages. The radio/head unit drops off the bus and may go silent. 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 U0184?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyRadio unpowered
- PossibleCAN wiring to radio 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
- 0.5–4 h
- Emissions test
- Usually unaffected
- Parts involved
- Radio Module, Can Bus Wiring
Related codes
- U0181Lost Communication with Auto Park Brake Module
- U0182Lost Communication with Headlamp Leveling Control Module
- U0183Lost Communication with Sunroof Control Module
- U0185Lost Communication with Antenna Control Module
- U0186Lost Communication with Audio Amplifier
- U0187Lost Communication with Disc Player Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.