A canister purge valve a solenoid valve controlled by the Power Train Control Module.
The Power Train Control Module is a control unit that the ignition timing, fuel amounts and other parameters needed to keep the engine running.
In the charcoal canister, the purge valve is the opening that releases fuel vapors that absorbed by the charcoal back into the engine for combustion.
A failed purge valve is one of many causes for check engine lights, and it often difficult for mechanics to diagnose.
The canister purge valve serves as part of the emission control system in a car, and it measures the flow and amount of fuel vapor that is into the combustion process via the charcoal canister, or fuel vapor storage device.
Canister purge valves also used in “leak tests,” by allowing a vacuum to be created throughout the fuel storage system when the valve is closed, thus preventing outside air from entering the system.
Replacing or upgrading your valve ensures that it works effortlessly to the quantity of fuel vapor that’s reprocessed into the fuel vapor storage, instead of releasing harmful toxins and gases into the atmosphere.