2. Fuel Vapor Recirculation Control

The evaporative emission control system prevents fuel vapor from escaping into the ambient air.

Charcoal canister

Fuel vapors generated in the fuel tank are absorbed and stored on board in the activated charcoal canister. When the engine is running, fuel vapors are drawn from the activated charcoal canister into the intake tract through the purge control solenoid valve.

purge control solenoid valve

The purge control solenoid valve is controlled by the engine control module. At idle and low coolant temperature, the purge control solenoid valve is closed so that fuel vapors do not reach the engine. When the engine reaches operating temperature, the purge control solenoid valve opens and fuel vapors are supplied to the engine.