OBD-II code · Network
U0180 Lost Communication with Automatic Lighting Control Module
The Automatic Lighting Control Module has stopped transmitting on the vehicle data bus, so other control units no longer receive its messages. Automatic exterior lighting (auto headlamps) stops working. Typical causes are loss of power or ground at the module, an open or shorted CAN/LIN bus wire, a connector fault, or an internal module failure.
Is it safe to drive with U0180?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyHeadlamp control module unpowered
- PossibleCAN wiring to headlamp module broken
- Less likelyGateway module routing CAN messages incorrectly
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Usually unaffected
- Parts involved
- Headlamp Control Module, Can Bus Wiring
Related codes
- U017DLost Communication With Restraints System Sensor N
- U017ELost Communication With Seat Belt Pretensioner Module A
- U017FLost Communication With Seat Belt Pretensioner Module B
- U0181Lost Communication with Auto Park Brake Module
- U0182Lost Communication with Headlamp Leveling Control Module
- U0183Lost Communication with Sunroof Control Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.