This keeps air pollution down, and keeps the smell of fuel from reaching the inside of your vehicle. How Evap orative Emission Control System s Work. A typical system consists of a small canister full of charcoal, valves, hoses, vents in the fuel lines and a sealed fuel tank cap. When fuel evaporates inside the gas tank, the excess vapors are transferred to the charcoal canister.
When your engine light comes on because of a weakness or failure in this system , you most likely won’t notice the car driving any differently. Everything will seem fine, except for the glowing check engine light on the dashboard. The canister purge valve allows stored fuel vapors in the containment canister to be recycled back into the engine combustion process when necessary. If there is a leak, usually caused by a loose or badly damaged gas cap, it triggers an event which activates the Check Engine light in the instrument panel.
The labor alone will cost somewhere between $and $14 while parts will run somewhere between $1and $440. The internal combustion process creates noxious chemicals (like COand nitrogen oxides) that are released into the air as we drive. The system can test the evap orative.
The powertrain control module (PCM) then monitors the ability of the system to maintain the vacuum.
