Lost Communication With Audio/Entertainment Control Module A
The U0184 code means the vehicle's onboard diagnostic system has detected: Lost Communication With Audio/Entertainment Control Module A. This is a low severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $100 - $600 (parts and labor)
Network codes mean modules are not communicating. You need a scanner that reads all systems to find the problem.
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Common Symptoms
- Audio system completely inoperative
- No sound from any speakers
- Radio display blank or frozen
- Steering wheel audio controls not working
- Bluetooth audio streaming unavailable
Probable Causes (Ranked by Likelihood)
- Failed audio amplifier or head unit Very High
- Damaged wiring to audio module High
- Software glitch in infotainment system Moderate
- Blown audio system fuse Low
Step-by-Step Diagnostic Procedure
-
Check the audio and entertainment system fuses
-
Try a hard reset by disconnecting the battery for 10 minutes
-
Inspect wiring to the audio amplifier (often in the trunk or under a seat)
-
Verify power and ground at the audio module connector
-
Scan for related infotainment codes
Common Fixes by Vehicle
What techs usually find when diagnosing U0184 on specific vehicles — tap your vehicle for the fix and the exact part:
2007-2014 Ford F-150/Expedition moderate DIY
U0184 (lost communication with radio) on Fords is commonly caused by a blown radio fuse (usually a 10A in the underhood or cabin fuse box). If the radio is completely dead, check fuses first. Next check the yellow B+ wire at the radio harness -- constant 12V should be present. Many Ford radios also use APIM (Accessory Protocol Interface Module) -- a failing APIM can trigger U0184 even when the radio is fine.
Labor: 30-90 min2005-2015 Chevrolet Silverado/GMC Sierra moderate DIY
GM truck U0184 often appears after a radio swap to an aftermarket unit without the proper CAN bus interface. If the OEM radio was just replaced, make sure a PAC or iDatalink bus interface is wired in. If the code appeared on a stock radio, pull fuse 23 (radio) and 26 (retained accessory power) and check. A dead radio that also triggers U0184 is usually replaced, not repaired.
Labor: 1-2 hours2006-2015 Dodge Ram 1500/2500 moderate DIY
Ram U0184 often points to a failed MyGig radio (RER/REN/RBZ units). MyGigs are known for backlight failure and CAN dropouts. Pull the radio, reseat the 40-pin connector, and retest. If the radio is completely unresponsive, a remanufactured MyGig runs ~$300. WIN (Wireless Ignition Node) failures can also trigger U0184 since radio wake-up runs through WIN.
Labor: 1-2 hoursFrequently Asked Questions
Can I drive with code U0184?
Yes, completely safe to drive. Only the audio and entertainment system is affected. No driving or safety systems are impacted.
What causes U0184?
Most often a failed audio amplifier or head unit. A software glitch can sometimes be resolved by disconnecting the battery for a reset.
Is U0184 expensive to fix?
Costs range from $100 for a fuse fix or reset to $600 for amplifier or head unit replacement. Try a battery disconnect reset before spending money.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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