U172A
Left High Beam Control Module Lost Communication With Left Headlamp Horizontal Motor
U172A is an OBD-II diagnostic trouble code meaning: Left High Beam Control Module Lost Communication With Left Headlamp Horizontal Motor. Common causes: open or short circuit in control circuit, malfunction of the headlight adjustment motor. Estimated repair cost: $17–89.
Symptoms
- Left headlight horizontal adjustment not working
- Error message on the dashboard
- Headlights can remain in one position
- Possible problems with automatic light adjustment
Causes
- Open or short circuit in control circuit
- Malfunction of the headlight adjustment motor
- Wiring Harness Problems
- Low beam control module malfunction
- Poor contact in connectors
How to Fix
- Check the integrity of the engine control circuit
- Inspect connectors and contacts for corrosion
- Check the operation of the adjustment motor
- Scan the control module for other errors
- If necessary, replace faulty components
Related codes
FAQ
What does the U172A code mean?
U172A is an OBD-II diagnostic trouble code that indicates: Left High Beam Control Module Lost Communication With Left Headlamp Horizontal Motor
What causes a U172A error code?
The most common causes of U172A include: Open or short circuit in control circuit; Malfunction of the headlight adjustment motor; Wiring Harness Problems; Low beam control module malfunction.
How do I fix a U172A diagnostic trouble code?
To fix U172A: Check the integrity of the engine control circuit. Inspect connectors and contacts for corrosion. Check the operation of the adjustment motor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U172A?
Yes, but get it checked soon
How much does it cost to fix U172A?
The estimated repair cost for U172A is $17–89. Actual cost depends on your vehicle, location, and labor rates.
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