Powertrain
generic / SAE
P25EC
Supercharger Disconnect Clutch Circuit Low
Voltage on the supercharger clutch control line is below the expected window. Usually a short to ground or a shorted clutch coil.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number5 / EC
Possible causes
- Control wire shorted to ground high
- Internal short in the clutch coil medium
- Connector pins corroded - high contact resistance low
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
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 200–1500 €
- Estimated time: 1–5 h
- Component: supercharger clutch
- Component: clutch solenoid
- Component: wiring harness
- MIL / check engine light
Sources
References
sae:J2012