OBD-II code · Network
U031A Software Incompatibility With Transmission Range Control Module
A module reports a software version mismatch with the transmission range control module — 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 U031A?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
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
- Transmission Range Module
Related codes
- U0317Software Incompatibility with Brake System Control Module
- U0318Software Incompatibility with Power Steering Control Module
- U0319Software Incompatibility with Anti-Lock Brake System Control Module
- U031BSoftware Incompatibility With DC/DC Converter Control Module A
- U031CSoftware Incompatibility With Brake System Control Module B
- U031DSoftware Incompatibility With Parking Assist Control Module A
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.