U0184
Lost Communication With Radio
Network / communication
Generic OBD-II
Low
What it means
U0184 means a controller has lost communication with the radio, or head unit — the module that runs the audio and infotainment system. When it drops off the network, the radio, audio, and often the display and steering-wheel controls stop responding, but the engine, brakes, and steering are unaffected. It is usually caused by a blown fuse, a wiring or connector fault, or a failed head unit.
Low
Can I keep driving? Yes — this affects the audio/infotainment system only, so the car drives and stops normally; you may just lose radio, audio, and some display functions.
Common symptoms
What you'll notice
- Radio or infotainment screen dead or frozen
- No audio, or controls unresponsive
- Steering-wheel audio controls not working
- The radio module unresponsive to a scan tool
Common causes
Most likely first
- Blown fuse feeding the radio/head unitLikely
- Damaged, corroded, or disconnected wiring or connector at the radioCommon
- CAN bus fault between the radio and the networkCommon
- Failed radio/head unitLess often
- Software glitch 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 radio responds at all.
- Check the radio's fuse, power, and ground feeds.
- Inspect the radio's connector and wiring behind the dash for damage or looseness.
- Check the CAN circuits between the radio and the gateway for opens or shorts.
- Try a power reset or reprogram; if it stays silent with good power and wiring, replace the unit, then clear and re-test.
FAQ
Quick answers
Is it safe to drive with U0184?+
Yes — it only affects the radio and infotainment, so the engine, brakes, and steering are unaffected; it's a convenience issue rather than a safety one.
Can I just clear U0184?+
You can, and sometimes a reset restores the radio, but if the wiring or unit is faulty the code returns until it's repaired.
Related codes
Often seen with U0184
Read & clear U0184 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