Empowering Technicians P0446 Diagnostic Strategies for Complex Systems

P0446 is an EVAP system code, and P0506 has to do with the Throttle Actuator Control (electric gas pedal) system. Does the purge vent normally stay open? Is this code strictly a diagnostic failure? If yes to both, I won't worry about this. 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 ... A damaged EVAP canister vent solenoid valve--Refer to Evaporative Emission Canister Vent Solenoid Valve Replacement . ... A damaged EVAP canister ... Making light repairs to shut off those annoying lights on the dash in my work truck. Let's have a look at this 2004 Chevy Truck that was dropped off at SMA from another shop that was having trouble diagnosing the classic ... Check your purge solenoid, it is probably stuck open. Other possibility is your Evap Canister filter is pluged. ... This DTC tests the evaporative ... The code po446 is "Evaporative Emission Control System Vent Control Circuit Malfunction" Feel free to do some more forum searches to see exactly what to look ... Best way to test the purge valve is either a smoke machine to see if it' stuck open or to disconnect the line from the canister to the purge valve and place a ... How to fix a Chevy / GMC P0446 engine Code: Evaporative Emission Control System Vent Control Circuit Malfunction Amazon Link to Smoke ...