OBD-II code · Powertrain (generic, extended)
P25EA Supercharger Disconnect Clutch Stuck Closed
The clutch that engages the mechanical supercharger to the engine drive will not open. The supercharger remains coupled at all loads, increasing parasitic loss and fuel consumption when boost is not needed.
Is it safe to drive with P25EA?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyArmature plate seized to the pulley face
- PossibleDriver stuck on keeps clutch energised
- Less likelyFailed pulley bearing welds clutch surfaces
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 2–6 h
- Emissions test
- Usually unaffected
- Parts involved
- Supercharger Clutch, Clutch Solenoid, Clutch Pulley
Related codes
- P25E7B Camshaft Position - Unable to Achieve Locked Position Bank 2
- P25E8B Camshaft Position Control Performance Bank 2
- P25E9Supercharger Disconnect Clutch Stuck Open
- P25EBSupercharger Disconnect Clutch Circuit Range/Performance
- P25ECSupercharger Disconnect Clutch Circuit Low
- P25EDSupercharger Disconnect Clutch Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.