What Does U0183 Mean?
Communication has been lost between the vehicle network and the rear lighting control module. This module controls tail lights, brake lights, reverse lights, and rear turn signals.
Safety Warning
Brake lights, turn signals, or tail lights may not function, creating serious collision risk. Vehicle is unsafe to drive and may not be legal to operate on public roads.
Common Causes
30%
Faulty rear lighting control module
25%
Damaged wiring or corroded connector at module
20%
Water damage or corrosion in trunk area affecting module
15%
Blown fuse to rear lighting module
10%
CAN bus network fault in rear circuit
Diagnostic Steps
1
Step 1: Verify all fuses related to rear lighting control module are functional
2
Step 2: Locate and inspect rear lighting module connector in trunk area for water damage or corrosion
3
Step 3: Test for proper voltage supply and ground at module connector
4
Step 4: Check CAN bus communication circuits for continuity and proper signal voltage
5
Step 5: Replace rear lighting control module if electrical circuits are verified as good
Estimated Repair Cost
$200 - $850
Parts + labor, varies by vehicle and location
Communication has been lost between the vehicle network and the rear lighting control module. This module controls tail lights, brake lights, reverse lights, and rear turn signals.
The most common cause of U0183 (Lost Communication With Rear Lighting Control Module) is: Faulty rear lighting control module
Typical repair costs for U0183 range from $200 to $850, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Brake lights, turn signals, or tail lights may not function, creating serious collision risk. Vehicle is unsafe to drive and may not be legal to operate on public roads.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U0183 to identify the root cause.
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Quick Info
Category
Network
System
Lighting System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
