Evaporative Emissions Control System Woes Understanding the PO446 Code

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). 1999 - 2016 Super Duty - Canister Vent Selonoid Testing PO446 - My 2011 F350 with the 6.2L gas engine has a CEL and code PO446. OK, here'e the deal: 1997 2.2 Legacy CEL on. Fault code 446("Evaporative Emmission Contrl System Vent Malfunction"). This same code had come ... 4) Take an air compressor and blow the vent valve out. 5) reinstall and clear the code and it's fixed. Now I know the updated part from gm is ... Code P0446 help! ... Hello guys i know the rules about use the search button but can find anything. Well my problem is that im having P0446 code ... 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 ... 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. 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 ... P0446: Evaporative Emission Vent System Performance help · Fuel tank sensor or its wiring · 5v reference circuit/wiring · Evap vent solenoid/wiring ... 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 ...