Evaporative Emissions System: Description and Operation

Evaporative Emission Control System:

GENERAL INFORMATION
The evaporative emission control system (EVAP) prevents fuel vapors generated in the fuel tank from escaping into the atmosphere.

Fuel vapors from the fuel tank flow through the fuel tank pressure control valve and vapor pipe/hose to be stored temporarily in the EVAP canister.

When driving with a low to medium load on the engine, the fuel vapor absorbed by the EVAP canister is drawn into the P port of the throttle body. When driving with a high load on the engine, the purge control valve opens and the fuel vapor absorbed by the EVAP canister is drawn into the air intake hose.