PO446 Code The Ultimate Guide to Evaporative Emissions System Diagnostics

P0446: Purge airline is blocked or high flow resistance in the EVAP canister. 03-30-2014 10:55 AM ... Let's have a look at this Chevrolet Cobalt that came with a code P0446 for the EVAP Vent Solenoid Performance. Code pulled is P0446: Evaporative Emission Control System Vent Control Circuit. Went to Mazda for a diagnostic out-of-warranty ($120). They found the issue was ... The code has nothing to due with "large leak" in EVAP system to replace the gas cap. You need to figure out the vent valve problem. Might be the ... Chased around a P0446 code for a week and finally fixed it today. 1. Replaced gas cap - code came back 2. Replaced Vent valve - $30 - code came back 3. Took ... It means you have a open or short in the vent cntrol valve that is allowing fuel vapor to be let into the air and not allowing the fuel system ... On the US models there is a valve that is located on the DS valve cover(front) that has some small vac hoses and an electrical connection. The ... DTC P0446 is a Type B DTC. ... DTC P0446 is a Type B DTC. ... An intermittent condition could be caused by a damaged EVAP vent housing, a temporary ... My Code Reader book says EVAP Emission Control System Vent Circuit Malf. Maybe somethings plugged up, if it's not venting, that would explain the extra ... 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.