Unveiling the Causes and Solutions for P0446 Evaporative Emission System Malfunctions

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 ... The manual I have shows the canister on the PS firewall area, with the Evap. gas check valve near the bottom of the canister. The purge solenoid ... ... po446, pressure, sensor, tank · Subscribe. Related Topics. evap code p0446....?helpppp and opinions? throwing code p0446 · p0446 evap canister ... I have a code p0446 for evap solenoid which is the solenoid mounted on the intake. does the code mean something is wrong with the solenoid itself? 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). This generic OBD-II code indicates that the evaporative vent valve in the emission control system is malfunctioning. Code P0446 means the car's computer has detected a problem with the EVAP system vent valve. The EVAP system is primarily composed of the gas tank, gas cap, ... I keep getting code po 446 on my 2003 Silverado. I have read that it could be the vent control valve. Any ideas? Well-Known Member. Established Member. Joined: Mar 11, 2007. Messages: 7,580. Location: poteet,texas. po446 start HX65 2003 PCED OBD SECTION 5 ... Corroded wire causing a check engine light with code P0446 and hard refueling.