Lost Communication With Automatic Headlamp Leveling Module
What does U0180 mean?
The U0180 code means the vehicle's onboard diagnostic system has detected: Lost Communication With Automatic Headlamp Leveling Module. This is a low severity code.
Common Symptoms
- Headlight leveling warning on dashboard
- Headlights aimed too high or too low
- Headlights do not adjust when loaded
- Automatic beam adjustment not working
- Oncoming drivers flashing their lights at you
Probable Causes (Ranked by Likelihood)
- Failed headlamp leveling module Very High
- Damaged headlamp leveling sensor at rear axle High
- Corroded wiring to leveling actuator in headlight Moderate
- Failed headlamp leveling motor in headlight assembly Moderate
Step-by-Step Diagnostic Procedure
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Check the headlamp leveling sensor link at the rear suspension
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Inspect wiring to the leveling motors in each headlight
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Verify power and ground at the headlamp leveling module
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Scan for related lighting system codes
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Manually adjust headlight aim as a temporary measure
Frequently Asked Questions
Can I drive with code U0180?
Yes, but your headlights may be aimed incorrectly. Be cautious driving at night as visibility may be reduced or you may blind oncoming drivers.
What causes U0180?
Usually a failed headlamp leveling sensor at the rear axle or a damaged leveling motor inside the headlight assembly. Common on European vehicles.
Is U0180 expensive to fix?
Typically $150 to $500. The rear axle sensor is less expensive to replace. Headlight leveling motors inside the headlight assembly cost more due to labor.