OBD-II code · Network
U034D Software Incompatibility With Vehicle Thermal Management Control Module
A module reports a software version mismatch with the vehicle thermal management 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 U034D?
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
- Thermal Management Module
Related codes
- U034ASoftware Incompatibility With Engine Disconnect Clutch
- U034BSoftware Incompatibility With Brake Booster Control
- U034CSoftware Incompatibility With Battery Energy Control Module C
- U034ESoftware Incompatibility With Active Grille Air Shutter Module A
- U034FSoftware Incompatibility With Active Grille Air Shutter Module B
- U0350Software Incompatibility With Active Grille Air Shutter Module C
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.