OBD-II code · Network
U0305 Software Incompatibility with Cruise Control Module
A control module has detected that its software/calibration is incompatible with the cruise control module. Cruise control may be disabled until matching software is flashed.
Is it safe to drive with U0305?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySoftware/calibration mismatch with cruise module
- PossibleUsed cruise module from different vehicle fitted
- 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
- 0.5–2.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Cruise Control Module, Control Module
Related codes
- U0302Software Incompatibility with TCM
- U0303Software Incompatibility with Transfer Case Control Module
- U0304Invalid Data Received from Transmission Control Module
- U0306Software Incompatibility with Fuel Injector Control Module
- U0307Software Incompatibility with Glow Plug Control Module
- U0308Software Incompatibility with Body Control Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.