U0542
Invalid Data Received From Headlamp Control Module A
U0542 is an OBD-II diagnostic trouble code meaning: Invalid Data Received From Headlamp Control Module A. Common causes: malfunction of the headlight control module, damage to the wiring harness to the headlight module. Estimated repair cost: $56–167.
Symptoms
- Incorrect operation of automatic headlights
- Lighting error message on dashboard
- Adaptive lighting doesn't work
- Headlights turn on/off spontaneously
- Reduced functionality of the lighting system
Causes
- Malfunction of the headlight control module
- Damage to the wiring harness to the headlight module
- Poor contact in module connectors
- Software error in the module
- Module power problems
How to Fix
- Check the connections and connectors of the headlight module
- Check the integrity of the wiring to the module
- Scan the headlight module for errors
- Update module software
- If necessary, replace the headlight control module
Related codes
Error U0542 by Vehicle Brand
FAQ
What does the U0542 code mean?
U0542 is an OBD-II diagnostic trouble code that indicates: Invalid Data Received From Headlamp Control Module A
What causes a U0542 error code?
The most common causes of U0542 include: Malfunction of the headlight control module; Damage to the wiring harness to the headlight module; Poor contact in module connectors; Software error in the module.
How do I fix a U0542 diagnostic trouble code?
To fix U0542: Check the connections and connectors of the headlight module. Check the integrity of the wiring to the module. Scan the headlight module for errors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0542?
Limited driving only, diagnose soon
How much does it cost to fix U0542?
The estimated repair cost for U0542 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat