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how to fix code P0446 on a 1999 chevy tahoe probable cause purge or vent solenoid defective saturated vapor canister failed evap vent solenoid need to know what parts to get to fix
Evap vent valve has only one purpose. It closes in order to seal the vent so the EVAP system can pressurize and ensure there are no leaks. Evap vent valve is usually supplied Battery voltage with key on. The ECM’s driver controls the ground, and when grounded, activates the valve (closing it). If the ECM detects a short to ground, and open,or a short to battery voltage on the control circuit, P0446 will set. Code also may refer to ECM detecting that EVAP system is unable to achieve or maintain vacuum during test. Symptoms There will be no obvious symptoms to driver, other than MIL illumination. Causes A code P0446 could mean one or more of the following has happened: Faulty vent valve Open, short or excessive resistance on Vent valve control circuit Blockage of vent valve Bad PCM Possible Solutions With a P0446 OBD-II trouble code, here are some things to try: Replace Vent valve Repair open, short, or resistance problem in control circuit Repair open, or short, or resistance problem in power circuit Replace PCM Check the sensor in the engine Replace the Vsv for the charcoal canister Look for a disconnectted or damaged hose around the air filter box that goes the evap solenoid
replace both because i had the same problem. and got the same codes. they do the same. because pcm don’t know with one.
Where is it located on a 2000 Tahoe limited 5.7? Thnx
Go to the local Chevy dealers parts counter. If this answer was helpful please remember to mark it accepted. Good Luck, N
