What Does U0481 Mean?
The receiving control module is detecting corrupted or implausible data from the Automatic Lighting Control Module on the vehicle network. This typically affects automatic headlamp, daytime running light, and ambient light-based lighting functions.
Common Causes
35%
Faulty automatic lighting control module with internal processor or memory failure
25%
Damaged wiring or corroded connectors between lighting module and communication network
20%
Failed or miscalibrated ambient light sensor sending incorrect data to module
12%
Poor module ground connection or power supply voltage issue
8%
Software glitch or outdated firmware in lighting control module
Diagnostic Steps
1
Step 1: Verify proper supply voltage and ground at automatic lighting control module connector
2
Step 2: Inspect module connector and wiring harness for corrosion, damage, or loose connections
3
Step 3: Test ambient light sensor operation and verify sensor signal voltage ranges
4
Step 4: Monitor lighting control module data parameters on scan tool to identify which data values are invalid
5
Step 5: Check for available software updates; perform module relearn procedure or replace module if data remains invalid
Estimated Repair Cost
$150 - $650
Parts + labor, varies by vehicle and location
The receiving control module is detecting corrupted or implausible data from the Automatic Lighting Control Module on the vehicle network. This typically affects automatic headlamp, daytime running light, and ambient light-based lighting functions.
The most common cause of U0481 (Invalid Data Received From Automatic Lighting Control Module) is: Faulty automatic lighting control module with internal processor or memory failure
Typical repair costs for U0481 range from $150 to $650, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Automatic headlights may not activate properly in low-light conditions, potentially reducing visibility. Manual headlight control typically remains functional as a backup.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U0481 to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Network
System
Lighting System / Body Control
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
