OBD-II code · Network
U0339 Software Incompatibility With Body Control Module B
A module reports a software version mismatch with body control module B (BCM) — typically after replacing one of the modules without programming the new unit to match the rest of the network.
Is it safe to drive with U0339?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyModule replaced without programming
- PossibleWrong part number for the vehicle
- 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
- Parts involved
- Body Control Module B
Related codes
- U0322Software Incompatibility with Body Control Module B
- U0331Software Incompatibility With Body Control Module A
- U0336Software Incompatibility With Restraints Control Module
- U0337Software Incompatibility With Battery Charger Control Module A
- U0338Software Incompatibility With Remote Function Actuation Module
- U033ASoftware Incompatibility With Hybrid/EV Battery Interface Control Module A
- U033BSoftware Incompatibility With Hybrid/EV Battery Interface Control Module B
- U033CSoftware Incompatibility With Hybrid/EV Battery Interface Control Module C
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.