Evaporative Emission Control Enigma Solved P0446 Code Explained

DTC P0446 Evaporative Emission Vent System Performance How to fix P0446 EVAP Vent system performance code on a GM or Chevy truck. 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). Code P0446, otherwise known as Evaporative Emission Control System (EVAP) Vent Control Circuit Malfunction, indicates that your car's computer ... Powertrain Diagnostic Trouble Code (DTC) Type Definitions. Scan Tool Reference. Special Tools Required. J 41413-200 Evaporative Emissions System Tester (EEST). The part you are talking about is on the driver side inner fender, it is the part with the rubber flange that just sits on a bracket. 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 ... The manual says it's "vent system performance" and that the system will throw a code if a leak is detected. Then later it says the canister or hoses are the ... When P0446 is triggered, the ECM has detected a short in the circuitry to activate the vent control valve, or the EVAP system failed to maintain the vacuum. 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 ... What Does Code P0446 Mean? · P0446 definition: Evaporative Emission Control System Vent Control Circuit Malfunction · Issue Severity: LOW– Continued driving for a ...