U0194
Lost Communication With Digital Audio Control Module B
Network / communication
Generic OBD-II
Low
What it means
U0194 means a controller has lost communication with digital audio control module B — one of the modules that processes and amplifies the vehicle's audio. When it drops off the network, sound and related infotainment functions stop working, but the engine, brakes, and steering are unaffected. It is usually caused by a blown fuse, a wiring or connector fault, or a failed audio module.
Low
Can I keep driving? Yes — this affects the audio system only, so the car drives and stops normally; you may just lose sound or some infotainment functions until it's fixed.
Common symptoms
What you'll notice
- No audio or degraded sound from the system
- Infotainment features tied to the audio module not working
- The digital audio control module unresponsive to a scan tool
- Intermittent audio dropouts
Common causes
Most likely first
- Blown fuse feeding the digital audio moduleLikely
- Damaged, corroded, or disconnected wiring or connector at the moduleCommon
- CAN bus fault between the audio module and the networkCommon
- Failed digital audio control module or amplifierLess often
- Software or configuration error after a battery or module serviceLess often
How to diagnose & fix
Work through it in order
- Scan all modules and confirm whether the digital audio module responds at all.
- Check the module's fuse, power, and ground feeds.
- Inspect the module's connector and wiring for damage or looseness.
- Check the CAN circuits between the module and the head unit or gateway for opens or shorts.
- If power and wiring are good but the module stays silent, replace or reprogram it, then clear and re-test.
FAQ
Quick answers
Is it safe to drive with U0194?+
Yes — it only affects the audio system, so the engine, brakes, and steering are unaffected; it's a convenience issue rather than a safety one.
Can I just clear U0194?+
You can, and a reset sometimes restores sound, but if the wiring or module is faulty the code returns until it's repaired.
Related codes
Often seen with U0194
Read & clear U0194 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX