What Does U0237 Mean?
Digital audio control module C (typically a secondary or rear seat entertainment audio controller) has stopped communicating on the network. This affects audio system functionality for a specific zone or output channel.
Common Causes
35%
Failed digital audio control module C or internal amplifier failure
30%
Damaged wiring harness or corroded connector to audio module
20%
Loss of power or ground circuit to the audio module
10%
MOST bus or audio network communication fault
5%
Software corruption requiring module reprogramming
Diagnostic Steps
1
Step 1: Verify power and ground supply to digital audio control module C using a multimeter
2
Step 2: Inspect module connector and wiring for physical damage, corrosion, or loose connections
3
Step 3: Check audio network communication (MOST, CAN, or Ethernet) for proper signals at module connector
4
Step 4: Monitor other audio modules to determine if communication fault is isolated or network-wide
5
Step 5: Replace audio control module C if circuits test good and reprogram with vehicle configuration
Estimated Repair Cost
$200 - $900
Parts + labor, varies by vehicle and location
Digital audio control module C (typically a secondary or rear seat entertainment audio controller) has stopped communicating on the network. This affects audio system functionality for a specific zone or output channel.
The most common cause of U0237 (Lost Communication With "Digital Audio Control Module C") is: Failed digital audio control module C or internal amplifier failure
Typical repair costs for U0237 range from $200 to $900, depending on the vehicle, location, and whether you do it yourself or go to a shop.
No safety impact. Specific audio zone or channel will be inoperative but vehicle remains fully drivable and safe.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U0237 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
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