How often should the carbon canister purge valve be replaced?

[Gonzalez]

There is no fixed replacement interval for the carbon canister purge valve. It only needs to be replaced when noticeable fuel odors occur inside the vehicle or when the engine idles abnormally. The carbon canister is designed for fuel conservation and environmental protection purposes. Its interior is filled with highly absorbent activated charcoal, which captures excess fuel vapors from the fuel tank through a connecting pipe, preventing their release into the atmosphere. When the engine operates at medium to high speeds, the electrically activated valve opens the passage. The vacuum from the engine's intake manifold then draws the combustible gases from the carbon canister into the cylinders for combustion. Simultaneously, outside air enters the canister through the breather port, flows through the absorption layer, mixes with fuel vapors to form combustible gas, and enters the engine's intake pipe. During this process, the activated charcoal in the canister is gradually regenerated due to the engine's suction effect.