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The code p0446 is triggered when the engine computer detects a problem with the vent control portion of the evaporative emission control system in a Chevy Tahoe. A common reason for this code is a defective vapor canister purge valve. An initial sign of a faulty purge valve could be rough idling. If the valve malfunctions and stays open, it can cause a vacuum leak that impacts the engine's idle performance. The vapor canister purge valve is a crucial part of the evaporative emission control system responsible for transferring stored vapors from the charcoal canister into the engine.
This issue is preventing my transmission from shifting into overdrive.
The p0446 code on a Chevy Tahoe signals a problem with the vent control component of the evaporative emission control system. A typical reason for this code is a malfunctioning vapor canister purge valve, which is straightforward to swap out.
P0446 is a code that indicates a malfunction in the vent control system of the evaporative emission control system. It is triggered when the engine computer detects a fault or blockage at the evap vent control component.
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