PO446 Code A Comprehensive Guide to Evaporative Emissions System Failure

Vapor Canister Purge Valve– One of the most common causes of the P0446 code is the vapor canister purge valve. It's really easy to replace. It could be as simple as the gas cap not seating correctly or could be, like in my case, the fuel line was rusted and leaking pressure and gas. P0446 is a vent valve contol circuit failure. If the electromagnet coil in the vent valve is burned out it'll appear to the ECM that the control circuit is ... Truck has a misfire that is only noticeable when cruising between 40 and 50 MPH, which is even worse when you try to go uphill at those speeds. General Technical & Electrical - P0446 EVAP Vent Control Circuit - Hey everyone! My 2007 2.3L gave a code P0446 : Evaporative Emission ... This diagnostic trouble code (DTC) is a generic OBD-II powertrain code. It is considered generic because it applies to all makes and models of vehicles (1996- ... This can be caused by a canister close valve being stuck closed, but more likely, it is a restricted air inlet filter at/near the charcoal ... P0446 Evaporative Emission Control System Vent Control Malfunction · Navbar Menu · P0446 Evaporative Emission Control System Vent Control ... If the vent control circuit is throwing a code, the vent isnt opening to allow pressure release on fill up. Thus causing the fill neck to back ... This code can be triggered by an actual vent valve malfunction but can also be triggered by a leaky gas cap. By leaky, I mean the seal is ...