U0172
NetworkModule Communicationlow severityLost Communication with Heads-Up Display Module
What U0172 Means
Cannot communicate with the secondary or extended heads-up display controller.
Symptoms
- HUD content missing
- HUD data not refreshing
- HUD brightness not adjusting
- Partial HUD display
Common Causes
- HUD controller failure
- CAN bus wiring
- Module power loss
- Fuse blown
Diagnostic Steps
- Check HUD controller fuse
- Test power and ground
- Check CAN wiring
- Test HUD display unit
- Check combiner glass position
Where to start: Check fuses and combiner glass alignment. HUD module may need reprogramming.
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