How Often Should the Car Charcoal Canister Be Replaced?

1 Answers
ChaseLee
07/30/25 3:51am
Car charcoal canisters should be replaced every 40,000 to 60,000 kilometers. Generally installed between the fuel tank and the engine, the charcoal canister utilizes the adsorption capacity of its internal activated charcoal to absorb and store gasoline vapors from the fuel tank. When the engine starts, the solenoid valve between the activated charcoal canister and the intake pipe opens according to the ECU's command. At this point, the gasoline vapors inside the activated charcoal canister are drawn into the cylinder along with air under the vacuum pressure of the intake pipe to participate in combustion. Due to the adsorption function of activated charcoal, when the car is running or turned off, gasoline vapors from the fuel tank enter the upper part of the activated charcoal canister through the pipeline, while fresh air enters the activated charcoal canister from the lower part.
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