OBD-II code · Network
U0331 Software Incompatibility With Body Control Module A
A module reports a software version mismatch with body control module A (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 U0331?
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 A
Related codes
- U0322Software Incompatibility with Body Control Module B
- U0339Software Incompatibility With Body Control Module B
- U0329Software Incompatibility With Steering Column Control Module
- U032ASoftware Incompatibility With A/C Compressor Control Module
- U0330Software Incompatibility With Tire Pressure Monitor Module
- U0332Software Incompatibility With Multi-axis Acceleration Sensor Module A
- U0333Software Incompatibility With Gear Shift Control Module B
- U0334Software Incompatibility With Radio
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.