What does code P2E81 mean?

Q: What does code P2E81 mean?

Cold Start Engine Coolant Bypass Valve D Stuck Closed. P2E81 indicates that the powertrain control module has detected a fault in the cold start engine coolant bypass valve circuit for valve 'D', specifically that the valve is stuck closed. The computer commands the valve to open during a cold start to speed cabin heating and reduce emissions, but the monitored temperature change or feedback signal does not match the expected response.

DTC codes / P2Exx · Hybrid propulsion / P2E81

P2E81Cold Start Engine Coolant Bypass Valve D Stuck Closed

P2E81 indicates that the powertrain control module has detected a fault in the cold start engine coolant bypass valve circuit for valve 'D', specifically that the valve is stuck closed. The computer commands the valve to open during a cold start to speed cabin heating and reduce emissions, but the monitored temperature change or feedback signal does not match the expected response.

SystemPowertrain

Code typeGeneric (all makes)

SeverityLow

Fix difficultyIntermediate

AreaHybrid propulsion

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.