OBD-II code · Network
U0185 Lost Communication with Antenna Control Module
The infotainment system has lost the antenna / tuner amplifier controller. Radio reception drops, navigation may lose GPS, and connected services can fail.
Is it safe to drive with U0185?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyAntenna 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
- 0.5–2 h
- Emissions test
- Usually unaffected
- Parts involved
- Antenna Module, Infotainment Bus
Related codes
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.