How Often Should the Charcoal Canister Purge Valve Be Replaced?

[Gordon]

The replacement interval for the charcoal canister purge valve is not fixed. You can determine its condition by measuring the valve's resistance. If the reading deviates from the standard value, the valve needs replacement. If symptoms like engine hesitation or gasoline odor persist after troubleshooting, inspect whether the charcoal canister requires replacement. Working principle of the charcoal canister: After the engine shuts off, gasoline vapors mix with fresh air inside the canister and are stored in the activated charcoal. When the engine starts, the solenoid valve between the activated charcoal canister and the intake manifold opens, allowing the gasoline vapors in the canister to be drawn into the cylinders by the intake manifold's vacuum, where they mix with clean air and participate in combustion.