Powertrain
Definition only
Lights the check engine lamp
P2E81: Cold Start Engine Coolant Bypass Valve D Stuck Closed
Standardized SAE J2012 code · P2Exx codes
What does P2E81 mean?
During cold start, engine coolant bypass valve D is stuck closed. Coolant cannot flow through the affected branch.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Common causes
- High Valve stuck closed at cold
- Medium Actuator response sluggish at cold
- Low Carbon or debris buildup preventing free movement
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P2E81 on the same make and model first.
P2E81 in the community
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