OBD-II code · Network
U0484 Invalid Data Received From Lighting Control Module — Rear A
A receiving module detected implausible data from rear lighting control module A. Tail/brake/turn/reverse lamp command vs. feedback values fail plausibility checks and are rejected.
Is it safe to drive with U0484?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyModule internal fault or sensor input drift
- PossibleSoftware version mismatch after replacement
- 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
- 0.5–2 h
- Emissions test
- Usually unaffected
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Rear Lighting Module A
Related codes
- U0553Invalid Data Received From Lighting Control Module — Rear B
- U0481Invalid Data Received From Automatic Lighting Control Module
- U0482Invalid Data Received From Headlamp Leveling Control Module A
- U0483Invalid Data Received From Lighting Control Module — Front
- U0485Invalid Data Received From Radio
- U0486Invalid Data Received From Antenna Control Module
- U0487Invalid Data Received From Audio Amplifier A
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.