U0180Lost Communication With Automatic Lighting Control Module
- Generic OBD-II code · Network
- How the car detects it
- U0180 belongs to the automatic lighting control module, the unit that evaluates a light sensor and switches the headlamps on at dusk, in tunnels or with the wipers. Once it is silent, the auto-light feature can no longer be commanded. The only public bulletin found comes from GM and fits poorly: PIE0348 and PIE0348A (Cadillac ATS 2013-2016, CTS 2014-2016 with premium amplifier) tie U0180 or B1325 to lost audio, chimes and turn-signal clicks, sometimes after rain or a car wash, without naming the module, so GM's use may differ from the J2012 name. Expect the lights to stay in manual mode or default to on; no MIL. U0181 and U0182 are the levelling and front lighting modules, U0481 invalid data.
- What you may notice
- Automatic headlamps no longer switch on or off
- Headlamps stay on as a default
- GM Cadillac: no audio, chimes or turn-signal sound
- Likely causes
- LikelyLight sensor or lighting module without power or ground
- PossibleMoisture at connectors after rain or car wash (GM PIE0348)
- PossibleBus or LIN line to the windscreen sensor damaged
- RareAutomatic lighting module faulty
- Repair
- Medium · Usually a job for a workshop.Typical cost: €40 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.