Powertrain
generic / SAE
P2E81
Cold Start Engine Coolant Bypass Valve D Stuck Closed
During cold start, engine coolant bypass valve D is stuck closed. Coolant cannot flow through the affected branch.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / numberE / 81
Possible causes
- Valve stuck closed at cold high
- Actuator response sluggish at cold medium
- Carbon or debris buildup preventing free movement low
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 150–800 €
- Estimated time: 1–4 h
- Component: engine coolant bypass valve d
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012