Evaporative Emission (EVAP) System Vent Valve Understanding P0446

2004 Pathfinder and she got a p0455 code (evap gross leak, large evap leak). Took to the dealer, they changed charcoal canister, vent valve, purge valve. Let's have a look at this Chevrolet Cobalt that came with a code P0446 for the EVAP Vent Solenoid Performance. Disclaimer: Under no circumstances will proclaimliberty2000 be responsible or liable in any way for any content, including but not limited ... I am also throwing a po446 code in my 98 c230 143000 miles gas cap in tact no issue there/have just replaced plugs and wires and coils for a ... P0446 is an EVAP system code, and P0506 has to do with the Throttle Actuator Control (electric gas pedal) system. 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). I have the PO446 and the gas cap seems ok, did the purge and vent valve…it keeps costing, the car has a rejection inspection sticker…need car ... DTC P0446 Evaporative Emission Vent System Performance How to fix P0446 EVAP Vent system performance code on a GM or Chevy truck. This is a common issue that stumps a lot of people - the dreaded Chevy P0446 code. This code causes folks to think new charcoal canisters, ... Here is what EvoRoadster said; Detection Condition: 1) Difference in fuel tank pressures measured when canister drain cut valve is released and ...