PO446 Code Evaporative Emissions System Troubleshooting Simplified

P0446 is a result of a test failure. The PCM closes the vent solenoid and opens the purge valve. It then monitors the fuel tank pressure sensor. I've had this P0446 Evap code that keeps popping up, and it's been difficult to fill up the tank without the nozzle clicking off several times. CEL came on a week after removing my throttle body to clean it, code P0446. - No vacuum leaks - Verified evap canister vent valve is ... Code P0446 help! ... Hello guys i know the rules about use the search button but can find anything. Well my problem is that im having P0446 code ... 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, ... The P0446 code on a Chevy Silverado signals a problem with the EVAP system vent control circuit, usually due to a faulty vent control valve, ... The symptom from my understanding was some fuel leakage on the floor when filling up and/or the inability to put gas in the truck without the pump shutting off ... It deals with the evap system for the fuel tank. From what I read online, it's fine to drive with it, which I guess I'll have to because the dealer can't see ... The code reads Evaporative Emission Control System Vent Control Circuit Malfunction, but I've come to believe that any of the EVAP codes can be a result of the ... 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 ...