U0194Lost Communication With Digital Audio Control Module B
- Generic OBD-II code · Network
- How the car detects it
- U0194 marks the second digital audio control module, B, as silent on the bus. GM uses the code but does not name the module publicly: on the 2013-2014 Buick Enclave, Chevrolet Traverse and GMC Acadia the radio stores U0194 together with many other U-codes when the harness of the rear side object detection sensors rubs on the exhaust and disturbs the network. Ford lists U0194 among codes on 2017 C-MAX vehicles with water in the active grille shutter connector, again without stating the module. The setting rule follows GM's U0100-U02FF logic: a supervised periodic message is missing at normal voltage. U0193 is module A, U0184 the radio. Audio features may cut out; no MIL of its own.
- What you may notice
- Radio shuts off or audio source drops out intermittently
- Many U-codes stored at the same time
- Cluster or other modules act up together with the radio
- Likely causes
- LikelyNetwork harness chafed elsewhere in the car disturbing the bus (GM Lambda)
- PossibleWater in a bus connector (Ford C-MAX)
- PossibleAudio module B without power or ground
- RareDigital audio module B faulty
- Repair
- Medium · Usually a job for a workshop.Typical cost: €40 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.