How to Determine if the Charcoal Canister Solenoid Valve is Faulty?

1 Answers
EloiseRose
07/29/25 1:49pm
You may observe phenomena such as fuel vapor leakage or dripping, or unexplained gas emission from the fuel tank cap. Below is relevant information about the charcoal canister solenoid valve: 1. Function: The charcoal canister solenoid valve is a device installed in vehicles to reduce air pollution caused by fuel vapor emissions while improving fuel efficiency. When the car starts, the solenoid valve opens, releasing adsorbed fuel vapor into the intake manifold to be burned in the engine. 2. Working Principle: Due to the sealed nature of the fuel tank, fuel consumption creates negative pressure inside the tank. Under this negative pressure, gasoline is more prone to vaporize compared to under normal atmospheric pressure.
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