2. Evaporative Emission Control System
The evaporative emission control system is designed to prevent fuel vapor from being released into the atmosphere.
Charcoal Canister
Fuel vapors generated in the fuel tank are absorbed and stored in the charcoal canister. While the engine is running, the fuel absorbed in this canister is drawn into the intake manifold through the purge control solenoid valve.
Purge Control Solenoid Valve
The purge control solenoid valve is controlled by the engine control module. When the engine is idling and the coolant temperature is low, the solenoid valve closes to prevent evaporated fuel from entering the engine. Once the engine warms up and operates at normal speed, the solenoid valve opens, allowing evaporated fuel to enter the engine.
Test yourself
A quick Hyundai Tucson quiz: every answer comes with an explanation and a link to the manual page.