U0543
Invalid Data Received From Headlamp Control Module B
U0543 is an OBD-II diagnostic trouble code meaning: Invalid Data Received From Headlamp Control Module B. Common causes: headlamp control module b malfunction, open or short circuit in the data transmission circuit. Estimated repair cost: $56–278.
Symptoms
- Error message on the dashboard
- Parts of the lighting functions do not work
- Flashing headlights
- Lack of response to switching lighting modes
- Errors in other related systems
Causes
- Headlamp control module B malfunction
- Open or short circuit in the data transmission circuit
- Wiring harness damage
- Contact corrosion
- Software problems
How to Fix
- Lighting system diagnostics
- Checking the integrity of the wiring harness
- Headlight module testing
- Module software update
- Replacing the headlight control module if necessary
Related codes
Error U0543 by Vehicle Brand
FAQ
What does the U0543 code mean?
U0543 is an OBD-II diagnostic trouble code that indicates: Invalid Data Received From Headlamp Control Module B
What causes a U0543 error code?
The most common causes of U0543 include: Headlamp control module B malfunction; Open or short circuit in the data transmission circuit; Wiring harness damage; Contact corrosion.
How do I fix a U0543 diagnostic trouble code?
To fix U0543: Lighting system diagnostics. Checking the integrity of the wiring harness. Headlight module testing. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0543?
Limited driving only, diagnose soon
How much does it cost to fix U0543?
The estimated repair cost for U0543 is $56–278. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat