OBD-II code · Network
U0327 Software Incompatibility with Powertrain Control Module
A control module has detected that its software version does not match the engine/powertrain ECU. Typically after a partial flash, mismatched coding, or fitting a used ECM from a different vehicle.
Is it safe to drive with U0327?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyECM software/calibration mismatch
- PossibleUsed ECM fitted from different 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
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–4 h
- Emissions test
- Usually unaffected
- Parts involved
- Ecm, Control Module
Related codes
- U0324Software Incompatibility with HVAC Control Module
- U0325Software Incompatibility with Auxiliary Heater Control Module
- U0326Software Incompatibility With Vehicle Immobilizer Control Module
- U0328Software Incompatibility With Steering Angle Sensor Module
- U0329Software Incompatibility With Steering Column Control Module
- U032ASoftware Incompatibility With A/C Compressor Control Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.