Discover the Ultimate Fuel Optimization Solution PO446

Videos are for Knowledge & Entertainment purposes only. Due to factors beyond the control of RB The Mechanic, it cannot guarantee against ... My engine light came on for this problem (P0446) Evaporative Emission System Vent Control Circuit... additionally i cant seem to pump more that about $.35 worth ... 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. P0446 Explained - EVAP Emission Control System Vent Control Circuit Malfunction (Simple Fix) · Comments123. It is most likely the valve in a line coming out of the gas tank. But they'd have to diagnose to know for sure, ie, supply power to the valve to see if it ... P0446 is an EVAP system code, and P0506 has to do with the Throttle Actuator Control (electric gas pedal) system. 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 (EVAP). P0446 indicates an Evaporative Emission Control (EVAP) system vent control circuit malfunction. Typically, this indicates a faulty vent valve. It could be the canister vent valve sticking, it could be a line leaking or it could be the canister itself. Well-Known Member. Established Member. Joined: Mar 11, 2007. Messages: 7,580. Location: poteet,texas. po446 start HX65 2003 PCED OBD SECTION 5 ...