Lost Communication With Rear Entertainment Control Module
The U0189 code means the vehicle's onboard diagnostic system has detected: Lost Communication With Rear Entertainment Control Module. This is a low severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $150 - $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
- Rear seat entertainment screens not working
- Rear DVD or streaming system inoperative
- Rear headphone jacks not functioning
- Rear HDMI or AV inputs not detected
- Rear climate or entertainment controls unresponsive
Probable Causes (Ranked by Likelihood)
- Failed rear entertainment control module Very High
- Damaged wiring to rear seat screens High
- Blown fuse for rear entertainment circuit Moderate
- Software fault in rear entertainment system Low
Step-by-Step Diagnostic Procedure
-
Check the rear entertainment fuse in the interior fuse box
-
Inspect wiring to the rear headrest or ceiling-mounted screens
-
Verify power and ground at the rear entertainment module
-
Try a system reset by disconnecting the battery
-
Check for loose connections at the rear screen mounting points
Frequently Asked Questions
Can I drive with code U0189?
Yes, completely safe to drive. Only the rear seat entertainment system is affected. Front audio and all vehicle systems work normally.
What causes U0189?
Most often a failed rear entertainment module or blown fuse. Kids interacting with rear screens and headphone jacks can cause wear on connectors over time.
Is U0189 expensive to fix?
Typically $150 to $600. Check the fuse first for a quick and cheap fix. Module or screen replacement is on the higher end.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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