What does a vapor canister do for the EVAP system?
The EVAP system traps smog-forming fuel vapors and prevents them from entering the atmosphere. A device called the vapor canister is the focal point of the EVAP system. What is a Vapor Canister? The vapor canister contains activated charcoal—an excellent medium for trapping fuel vapors.
When to get an evaporative emission control canister replaced?
If you’re experiencing any of the above mentioned symptoms and suspect your evaporative emission control canister is in need of replacement, get a diagnostic or book an evaporative emission control canister replacement service with a professional mechanic.
How does the EVAP system work in a car?
The vapor canister is the focal point of the EVAP system. When the engine is off, fuel vapors from the gas tank are stored in the canister. The canister contains activated charcoal, which traps the vapors until the engine is running, and conditions are correct for a vapor purge.
How does activated charcoal work in an EVAP system?
The canister contains activated charcoal, which traps the vapors until the engine is running, and conditions are correct for a vapor purge. Normally, the vapor canister is open to the atmosphere to allow fresh air to enter. The canister is only closed when the EVAP monitor is run (more on that later).
When to replace an evaporative emission control canister?
When the EVAP emissions canister fails it triggers an OBD-II error code (0499) collected by the vehicle’s ECM and tells a mechanic that there is a pressure problem with the EVAP system. If the EVAP canister is damaged or not working properly, it needs to be replaced, as it can’t be serviced or repaired on the vehicle.
What does an EVAP canister do for a car?
Amongst these systems is an EVAP (Evaporative Emission Control) system. This system closes in fuel vapors and prevents the vapor from escaping into the environment. Hence, reducing gas emission. The EVAP canister is one of the key components in this system.
How much charcoal is in an EVAP canister?
The canister stores about 2 lb. of activated charcoal used to store and contain fuel vapors until your purge valves open up and allow the engine intake’s vacuum to absorb some fuel vapors from the charcoal into the intake manifold of your engine. This is done to reduce gas emissions from your vehicle.
How is the VSV used in the EVAP system?
VSV (vacuum switching valve) to purge the evaporative emissions from the charcoal canister. The ECM uses the vapor pressure sensor to detect malfunctions in the evaporative emissions (EVAP) sys- tem.