Powertrain
generic / SAE
P25AC
Piston Cooling Oil Control Circuit Performance/Stuck Off
The control circuit is electrically intact, but the solenoid valve does not open when commanded — confirmed by oil-pressure or oil-temperature feedback that does not change after the activation pulse. Piston cooling does not engage under high load — risk of piston-crown overheating and ring-land cracks.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number5 / AC
Possible causes
- Solenoid stuck closed by oil sludge high
- Carbon or debris buildup preventing free movement low
- Component wear with age - mechanical play low
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 300–1500 €
- Estimated time: 1.5–5 h
- Component: piston cooling solenoid
- MIL / check engine light
Sources
References
sae:J2012