U0242

Lost Communication With Headlamp Control Module B

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Some headlight functions do not work (for example, cornering lights)
Error message on the dashboard
Headlights only work in basic mode
Adaptive lighting does not function

Causes

Open or short circuit in the wiring to the module
Malfunction of the headlight control module
Connector corrosion
Module power problems
Software glitches

How to Fix

Check the integrity of wiring and connectors
Test the power supply and ground of the module
Scan the module for additional errors
If necessary, replace the headlight module
Reflash the module if there are updates

Related codes

U0241 U0243 U0244