Powertrain
generic / SAE
P26D7
Engine Coolant Pump Clutch Performance/Stuck Off
The coolant pump clutch is commanded on but does not engage. Coolant flow is missing under load, leading to overheating.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number6 / D7
Possible causes
- Worn friction surfaces enlarge air gap high
- Weak solenoid magnetic force 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
Sources
References
sae:J2012