The typical non-enhanced EVAP system

contains the following components

EVAP emission pressure control valve.

Vented canister.

Diagnostic switch

EVAP purge solenoid.

The Enhanced EVAP System uses

the following components

Evaporative system canister.

Fuel tank pressure sensor.

Canister purge solenoid.

Canister vent solenoid.

Service port.

Fuel cap.

Fuel level sensor.