Possible causes – Faulty canister vent control valve– Purge Control Valve harness is open or shorted– Purge Control Valve electrical circuit poor connection Tech description There is a factory service bulletin for the following Nissan models: 2002 Nissan Altima2003 Nissan Altima2004 Nissan Altima2005 Nissan Altima2002-2005 Nissan Altima Factory Service Bulletin OBDII Code P0447 When is…