P0448 Nissan - Evaporative Emission Control System Vent Control Circuit Close
- Purge Control Valve harness is open or shorted
- Purge Control Valve electrical circuit poor connection
There are factory service bulletins for the following Nissan models:
2005-2007 Nissan Pathfinder
2005-2007 Nissan Pathfinder Factory Service Bulletin OBDII Code P0448
2007-2009 Nissan Altima Sedan
2008-2009 Nissan Altima Coupe
2007-2009 Nissan Altima Hybrid
2009 Nissan Maxima
Nissan Factory Service Bulletin OBDII Code P0448
2006-2015 Nissan Titan
2006-2015 Nissan Titan Factory Service Bulletin OBDII Code P0448
The Evaporative Emission System (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 Engine Control Module (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 componentsThis 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.