What does code P1440 mean?

Q: What does code P1440 mean?

Purge Valve Stuck Open. P1440 on a Jaguar indicates the engine control module has detected that the evaporative emissions purge valve is stuck open, allowing fuel vapor to flow into the intake manifold when it should be sealed. The computer commands the valve closed and monitors the resulting fuel trim or pressure changes, and when the expected change does not occur, it flags the valve as stuck open.

DTC codes / Jaguar codes / P1440

P1440 · JaguarPurge Valve Stuck Open

P1440 on a Jaguar indicates the engine control module has detected that the evaporative emissions purge valve is stuck open, allowing fuel vapor to flow into the intake manifold when it should be sealed. The computer commands the valve closed and monitors the resulting fuel trim or pressure changes, and when the expected change does not occur, it flags the valve as stuck open.

SystemPowertrain

Code typeJaguar specific

SeverityMedium

Fix difficultyIntermediate

AreaAuxiliary emission controls

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