P0446 Code The Ultimate Guide for Engine Health

26 - GM P0446 Vent System Performance-Diagnose & Fix it Right the First Time! ... The Common GM EVAP Code How to Diagnose and Repair. P0446 Evaporative Emission Control System Vent Control malfunction. ... okay I got this same code recently and have not been able to figure ... Possible causes · Missing Fuel cap · Incorrect fuel filler cap used · Fuel filler cap remains open or fails to close · Foreign matter caught in ... P0446 is set when there is an evaporative emissions leak from the components or when there is a malfunction in either the VSV for EVAP, the VSV ... The manual says it's "vent system performance" and that the system will throw a code if a leak is detected. Then later it says the canister or hoses are the ... P0446 is not an electrical issue--it indicates a physical blockage in the vent portion of the evap system. Trouble code P0446 indicates that the engine control unit has detected an issue with your vehicle's evaporative emission control system (EVAP) vent valve. Check Engine Code P0446 · 1) malfunctioning Evaporative Emission Canister Vent Solenoid Valve or pinched vent hose · 2) evap canister filter ... Claim your FREE engine code eraser https://free.nonda.co ============================= nonda Auto DIY Center is the biggest auto DIY ... 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.