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 on a Chevy Tahoe. One of the most common causes of this code is a bad or faulty vapor canister purge valve. One of the firSTSymptoms that a faulty canister purge valve may produce is a rough idle. If the canister purge valve fails and sticks open, it will create a vacuum leak that can affect the engine idle speed and quality.A vapor canister purge valve is a component of the evaporative emission control system. Its main function is to bring those stored vapors into the engine from the charcoal canister.
Ed
October 22, 2020
Well this cause my transmission not to go in and over drive
Don L.
April 9, 2020
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 on a chevy tahoe. One of the most common causes of the p0446 code is the vapor canister purge valve. Its really easy to replace.
Claudia T.
April 9, 2020
P0446 circuit malfunction of the evaporative emission control system vent control system. Code p0446 is set when a fault or restriction is recognized by the engine computer at the evaporative emission control system (evap) vent control part.
Kathy
September 21, 2020
How much to do this job
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