OBD-II code · Network
U0308 Software Incompatibility with Body Control Module
The BCM software does not match what other vehicle modules expect. Comfort or lighting features can behave erratically until reflashing or coding is performed.
Is it safe to drive with U0308?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyIncompatible flash after BCM swap
- Less likelyGateway module routing CAN messages incorrectly
- Less likelyCAN terminating resistor (120 Ω) drifted out of spec
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
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–2.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Body Control Module, Vehicle Gateway
Related codes
- U0305Software Incompatibility with Cruise Control Module
- U0306Software Incompatibility with Fuel Injector Control Module
- U0307Software Incompatibility with Glow Plug Control Module
- U0309Software Incompatibility With Alternative Fuel Control Module
- U030ASoftware Incompatibility With Evaporative Emission System Leak Detection Control Module
- U030BSoftware Incompatibility With Glow Plug Control Module 2
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.