Powertrain
generic / SAE
P26D8
Engine Coolant Pump Clutch Stuck On
The coolant pump clutch remains engaged when commanded off. Pump runs continuously, slowing warm-up and increasing parasitic load.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number6 / D8
Possible causes
- Armature plate seized to the pulley face high
- Driver stuck on keeps clutch energised medium
- Carbon or debris buildup preventing free movement 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: 200–1200 €
- Estimated time: 1–3.5 h
- Component: coolant pump clutch
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012