Evaporative Emissions

Evaporative Emissions

The Evaporative Emission (EVAP) system consists of the:

- EVAP (Evaporative Emission) canister.

- EVAP (Evaporative Emission) canister purge valve.

- fuel tank.

- fuel vapor tubes

- natural vacuum leak detection module.

The EVAP (Evaporative Emission) system:

- prevents hydrocarbon emissions from reaching the atmosphere.

- stores fuel vapors in the EVAP (Evaporative Emission) canister that are generated during vehicle operation hot soak or vehicle refueling, until they can be consumed by the engine during normal engine operation.

- routes the stored fuel vapors to the engine during engine operation.

The fuel vapors are routed:

- to the EVAP (Evaporative Emission) canister through a vapor tube.

- to the engine when the EVAP (Evaporative Emission) canister purge valve is opened.

The EVAP (Evaporative Emission) canister:

- is located under the rear of the vehicle.

- contains activated carbon.

- stores fuel vapors.

The EVAP (Evaporative Emission) canister purge valve:

- is normally closed.

- regulates the purging of the EVAP (Evaporative Emission) canister.

The natural vacuum leak detection module:

- completes a series of checks to confirm the integrity of the enhanced EVAP (Evaporative Emission) system components in the engine running state and the ignition OFF state.

Refer to Computers and Control Systems Information for additional information on the EVAP (Evaporative Emission) system.

Vehicle Emission Vacuum Routing