Lost Communication With Head-Up Display Module
The U0239 code means the vehicle's onboard diagnostic system has detected: Lost Communication With Head-Up Display Module. This is a low severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $300 - $1,500 (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
- Head-up display not projecting
- HUD image flickering or distorted
- HUD brightness not adjusting
- HUD settings not saving
Probable Causes (Ranked by Likelihood)
- Failed HUD projector module Very High
- HUD mirror or lens damage High
- CAN bus wiring fault to HUD Moderate
- Windshield replacement affected HUD film Low
Step-by-Step Diagnostic Procedure
-
Check HUD fuse and power supply
-
Scan HUD module for fault codes
-
Inspect HUD lens and mirror for damage
-
Verify windshield has HUD-compatible film
Frequently Asked Questions
Can I drive with U0239?
Yes. Only the HUD display is affected. All instruments remain functional.
What causes U0239?
Usually a failed HUD projector or lens damage. After windshield replacement, HUD may need recalibration.
Is U0239 expensive?
HUD modules can be costly at $300 to $1,500 depending on the vehicle.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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