U0484Invalid Data Received From Lighting Control Module - Rear A
- Generic OBD-II code · Network
- How the car detects it
- U0484 is set when frames from rear lighting control module A are received but carry values the listener cannot accept; U0183 stands for lost contact, while rear module B has U0252 and U0553. Such modules drive tail, stop and turn lamps or LED segments at the back and report their status. BMW's 2022 iX shows the layout: four rear light modules, two in the side panels and two in the tailgate, share Body_CAN, and a software error in them produced communication and time-out entries with rear light warnings although the lamps worked (SIB 63 06 22). GM updated the exterior lighting module of 2024 Corvettes that failed to tell the driver about a failed rear turn signal, an indication FMVSS 108 requires. No maker documents U0484 itself. Lamp warnings, possible default lighting; no MIL.
- What you may notice
- Rear light system warning although the lamps may still work
- Turn, stop or tail lamp failures not reported or lamps in default mode
- Likely causes
- LikelySoftware error in the rear lighting module or a module not updated to the current level
- PossibleChafed or broken wires in the tailgate or boot lid harness
- RareWater ingress at a rear lamp connector
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.