U0183Lost Communication With Lighting Control Module - Rear A
- Generic OBD-II code · Network
- How the car detects it
- U0183 refers to rear lighting control module A, the unit that drives tail, brake, turn and in some designs reversing lamps at the back of the vehicle. A second rear unit, B, has U0252, the front module U0182. Such modules are found where LED rear lamps are switched and checked electronically, for example in a tailgate. No manufacturer documents U0183 publicly; neither GM's U-code list nor the NHTSA bulletin index carries it. GM's generic description for codes U0100-U02FF gives the trigger: an expected periodic message from the module goes missing while the system voltage is 9-16 V. Rear lamps may fail, fall back to a default pattern or raise a bulb warning. That matters for being seen, although no MIL is involved.
- What you may notice
- Tail, brake or turn lamps at the rear not working
- Bulb or lighting warning in the cluster
- Rear lamps in a fixed default mode
- Likely causes
- LikelyRear lighting module without power or ground
- PossibleWiring broken in the tailgate or boot lid hinge loom
- PossibleCorroded connector at the rear lamp or module
- RareRear lighting control module A 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.