OBD-II code · Network
U034F Software Incompatibility With Active Grille Air Shutter Module B
A module reports a software version mismatch with active grille shutter module B — 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 U034F?
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
- Active Grille Shutter Module B
Related codes
- U034ESoftware Incompatibility With Active Grille Air Shutter Module A
- U0350Software Incompatibility With Active Grille Air Shutter Module C
- U0351Software Incompatibility With Active Grille Air Shutter Module D
- U034CSoftware Incompatibility With Battery Energy Control Module C
- U034DSoftware Incompatibility With Vehicle Thermal Management Control Module
- U0352Software Incompatibility With NOx Sensor C
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.