What Does U0241 Mean?
Headlamp control module A has stopped communicating on the vehicle network. This module manages adaptive headlights, automatic high beams, or dynamic beam leveling features.
Common Causes
35%
Failed headlamp control module A
30%
Damaged wiring harness or connector to module
20%
CAN bus network fault or short circuit
10%
Loss of power supply or ground to module
5%
Module firmware corruption or version incompatibility
Diagnostic Steps
1
Step 1: Check battery voltage supply and ground at headlamp control module connector
2
Step 2: Inspect module connector and wiring for physical damage or corrosion
3
Step 3: Measure CAN bus voltages at module to verify network communication signals
4
Step 4: Test basic headlamp operation to determine if module is completely failed
5
Step 5: Attempt module reprogramming or replace if all circuits are functioning properly
Estimated Repair Cost
$300 - $1,500
Parts + labor, varies by vehicle and location
Headlamp control module A has stopped communicating on the vehicle network. This module manages adaptive headlights, automatic high beams, or dynamic beam leveling features.
The most common cause of U0241 (Lost Communication With Headlamp Control Module "A") is: Failed headlamp control module A
Typical repair costs for U0241 range from $300 to $1,500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Adaptive headlight features, automatic high beams, or beam leveling may be disabled. Basic headlight operation may continue but with reduced functionality affecting nighttime visibility.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U0241 to identify the root cause.
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Quick Info
Category
Network
System
Exterior Lighting / Headlamp Control
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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