What Does U0189 Mean?
The tertiary disc player/changer module (designated as 'C') is not responding on the communication network. This is found in luxury vehicles with multiple independent entertainment systems.
Common Causes
40%
Failed disc player/changer module C electronics
25%
Corroded or damaged wiring and connectors to module C
20%
Power or ground circuit failure to module C
15%
Communication network malfunction at module C location
Diagnostic Steps
1
Step 1: Test power and ground circuits at module C connector using multimeter
2
Step 2: Inspect all connectors and wiring for damage, corrosion, or improper connections
3
Step 3: Measure communication bus signals at module C per manufacturer specifications
4
Step 4: Verify other modules on same network segment are communicating properly
5
Step 5: Replace disc player module C if electrical circuits are functioning but module won't communicate
Estimated Repair Cost
$150 - $700
Parts + labor, varies by vehicle and location
The tertiary disc player/changer module (designated as 'C') is not responding on the communication network. This is found in luxury vehicles with multiple independent entertainment systems.
The most common cause of U0189 (Lost Communication With Digital Disc Player/Changer Module "C") is: Failed disc player/changer module C electronics
Typical repair costs for U0189 range from $150 to $700, depending on the vehicle, location, and whether you do it yourself or go to a shop.
No safety concerns. Third zone disc entertainment system will not function.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U0189 to identify the root cause.
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Quick Info
Category
Network
System
Infotainment/Audio System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
