Mastering the P0446 Code A Comprehensive Resource for Professionals

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 ... P0446 is not an electrical issue--it indicates a physical blockage in the vent portion of the evap system. if by some chance the gas cap is causing an issue that would throw a different p code. p0446 relates to the valve you could waste time ... the po446 dtc is checking for a blocked evap path. it does this by commanding the purge valve open and watching for vacuum build up from the ... The P0446 codes triggered when an improper voltage signal is sent to Engine Control Module (ECM) through EVAP canister vent control valve. 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. P0440, P0442, and P0446 are all EVAP related codes that are the inverse of one another. One is for not being able to maintain pressure and decay at a ... I keep getting code PO466 Evaporative emission control system vent control circuit. It comes on for a couple days then goes off and then reappears again. Check Engine Code P0446 · 1) malfunctioning Evaporative Emission Canister Vent Solenoid Valve or pinched vent hose · 2) evap canister filter ... The code sets due to blockage in the EVAP vent, not the portion that goes to your engine. Usually the vent solenoid is the cause but you've ...