DTC P1446 EVAP CANISTER VENT CONTROL VALVE
The EVAP canister vent control valve is located on the EVAP canister and is used to seal the canister vent.
This solenoid valve responds to signals from the ECM. When the ECM sends
an ON signal, the coil in the solenoid valve is energized. A plunger
will then move to seal the canister vent. The ability to seal the vent
is necessary for the on board diagnosis of other evaporative emission
control system components.
This solenoid valve is used only for diagnosis, and usually remains
opened. When the vent is closed, under normal purge conditions, the
evaporative emission control system is depressurized and allows "EVAP
Control System (Small Leak, Gross Leak, Very Small Leak)" diagnosis.
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