Drive with Confidence PO446 Ensures Maximum Fuel Savings

P0446 is a "vent control circuit malfunction" so the problem should be located somewhere in the vent valve or its wiring. If it were a leak it would be P0442. Check your purge solenoid, it is probably stuck open. Other possibility is your Evap Canister filter is pluged. ... This DTC tests the evaporative ... I have an 04 Crew cab with the I5. My CEL light is on and I get the P0446 code (Evaporative Emission System Vent Control Circuit). If you drive in a dusty/dirty enviroment, the EVAP canister vent valve can become blocked with dirt and crud. ... and a new bracet for the valve, ... Come along with Eric & Ivan in this diagnosis as Ivan double checks Eric's original diagnosis on this 2008 Ford Escape 3.0 AWD. My vehicle: 2004 Suburban 2500 LT, 4x4, 8.1L engine, Whipple supercharger. Bought from original owner with 208000 miles. 2007-2010 owners out there that might currently be experiencing the dreaded P0449, or P0445 (with tighten gas cap on the DIC) codes. Problems/Service/Repairs - PO446 Error Code - I know that this code is an emissions venting problem that can be associated with the gas cap, ... Disclaimer: Under no circumstances will proclaimliberty2000 be responsible or liable in any way for any content, including but not limited ... P0446 is a diagnostic trouble code (DTC) for "Evaporative Emission Control System Vent Control Circuit Malfunction". This can happen for multiple reasons.