EVAP System Malfunctions Understanding and Troubleshooting P0446

Could be gas cap. Could be tank vent valve/filter. Fuel Recirc Charcoal canister. Or a hose gone bad and not holding vac/pres. All these MAY set ... The code P0446 is set when the engine computer recognizes a fault or restriction at the vent control part of the Evaporative emission control system. The fault code P0446 means your vehicle's evaporative emission control system or the vent valve in the EVAP system is malfunctioning. The PO446 code could be one of many things, including the charcoal canister itself, the VSV attached to the canister, or the vacuum valve up underneath the ... Error code P0446 indicates a malfunction in the EVAP vent control circuit of the vehicle. Where is the evaporative emissions vent control valve? What is a P0446 Code? Better yet, what the heck is a Evaporative Emission System Vent Control Circuit? Well I ran into this problem with my ... This generic OBD-II code indicates that the evaporative vent valve in the emission control system is malfunctioning. Code P0446 is a diagnostic trouble code (DTC) that indicates a problem with the evaporative emission control (EVAP) system vent control ... 2004 Pathfinder and she got a p0455 code (evap gross leak, large evap leak). Took to the dealer, they changed charcoal canister, vent valve, purge valve. Come along with Eric & Ivan in this diagnosis as Ivan double checks Eric's original diagnosis on this 2008 Ford Escape 3.0 AWD.