Fuel Savings Redefined PO446 Revolutionizes Driving

Code P0446 indicates that there is an improper voltage drop in the EVAP Vent Valve circuit, which can be caused by either too little or too much electrical ... 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. DTC P0446 or P1450 indicates that Self-Test has detected the Evaporative Emission Control System has excessive fuel tank vacuum. 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). P0401 is usually the EGR VSV. P0446 can be a number of things including vapor leaks. I start with the gas cap (quick/easy). Sometimes it is the ... Here is what EvoRoadster said; Detection Condition: 1) Difference in fuel tank pressures measured when canister drain cut valve is released and ... Does your car sputter and stall? Getting a P0446 trouble code? Don't rush to the mechanic yet! This code often points to a faulty emissions ... The fault code P0446 means your vehicle's evaporative emission control system or the vent valve in the EVAP system is malfunctioning. P0446 is a "vent control circuit malfunction" so the problem should be located somewhere in the vent valve or its wiring. If it were a leak it would be P0442. This generic OBD-II code indicates that the evaporative vent valve in the emission control system is malfunctioning.