OBD-II code · Network
U02BF Lost Communication With Interior Lighting Control Module B
The vehicle bus reports loss of communication with interior lighting control module B. Ambient lighting zones, reading lamps and door courtesy lights driven by this node fall back to a default state.
Is it safe to drive with U02BF?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyBus wiring open or shorted
- PossibleModule without power or ground
- PossibleModule failed
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
- Easy
- DIY friendly
- Often, with basic tools
- 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
- Interior Lighting Module B, Vehicle Bus Wiring
Related codes
- U024ALost Communication With Interior Lighting Control Module A
- U02BCLost Communication With Localization and Mapping Module
- U02BDLost Communication With Night Vision Control Module
- U02BELost Communication With Trailer Backup Assist Control Module
- U02C0Lost Communication With Active Radiator Air Flow Control Module A
- U02C1Lost Communication With Hybrid/EV Electronics Coolant Pump C
- U0300Internal Control Module Software Incompatibility
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.