Symptoms

- Engine Light ON (or Service Engine Soon Warning Light)

Possible Causes

- Damage harness or connectors to the Purge Control Valve - The valve circuit is open or shorted - EVAP canister vent control valve may be faulty

When Detected

EVAP canister vent control valve remains closed under specified driving conditions.

Tech Notes

Very common problem with Nissan vehicles. Before replacing any parts, check for damage EVAP canister and for loose hoses from the vent control valve to the canister. There are service bulletins available for 2004-2006 Nissan Armada, 2005-2008 Nissan Frontier, 2005-2008 Nissan Xterra, 2005-2008 Nissan Pathfinder, 2007-2009 Nissan Versa, 2007-2009 Nissan Sentra, 2007-2009 Nissan Altima.

Description

The EVAP canister vent control valve is located on the EVAP canister and is used to seal the canister vent. This solenoid (the EVAP canister vent control 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) diagnosis.