U0543

Invalid Data Received From Headlamp Control Module B

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–278 (est.)

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

U0542 U0544 U0155