Kia Optima: Emission Control System / Evaporative Emission Control System

Kia Optima DL3 2019-2020 Service and Repair Manual / Emission Control System / Evaporative Emission Control System

Description and operation
Description

Evaporative Emission Control System prevents fuel vapor stored in fuel tank from vaporizing into the atmosphere. When the fuel evaporates in the fuel tank, the vapor passes through vent hoses or tubes to canister filled with charcoal. The canister temporarily holds the vapor in the charcoal. If ECM determines to draw the gathered vapor into the combustion chambers during certain operating conditions, it will vacuum into intake manifold.

Schematic diagrams
Schematic Diagram

1. Air cleaner
2. Delivery pipe & injector
3. Engine
4. Purge control solenoid valve (PCSV)
5. Fuel tank air filter
6. Fuel pump
7. Fuel filler neck
8. Fuel filler cap
9. Fuel tank

Canister

Canister is filled with charcoal and absorbs evaporated vapor in fuel tank. The gathered fuel vapor in canister is drawn into the intake manifold by the ECM/PCM when appropriate conditions are set.

Purge Control Solenoid Valve (PCSV)

Purge Control Solenoid Valve (PCSV) is installed in the passage connecting canister and intake manifold. It is a duty type solenoid valve and is operated by ECM/PCM signal.

To draw the absorbed vapor into the intake manifold, the ECM/PCM will open the PCSV, otherwise the passage remains closed.

Fuel Filler Cap

A ratchet tightening device on the threaded fuel filler cap reduces the chances of incorrect installation, which would seal the fuel filler. After the gasket on the fuel filler cap and the fill neck flange contact each other, the ratchet produces a loud clicking noise indicating the seal has been set.

Positive Crankcase Ventilation (PCV) Valve
Description and operation Operation Principle Repair procedures Removal 1. Disconnect the vapor hose (A). 2. Remove the PCV val ...

Canister
Repair procedures Removal 1. Disconnect the negative (-) battery cable. 2. Remove the stabilizer bar bushing (A). Tightening ...

Other information:

Kia Optima DL3 2019-2020 Owner's Manual: Occupant Detection System (ODS)


Your vehicle is equipped with an occupant detection system in the front passenger's seat. The occupant detection system is designed to detect the presence of a properly-seated front passenger and determine if the passenger's front air bag should be enabled (may inflate) or not. Only the fro ...

Kia Optima DL3 2019-2020 Owner's Manual: Heating and air conditioning


1. Start the engine. 2. Set the mode to the desired position. For improving the effectiveness of heating and cooling; - Heating: - Cooling: 3. Set the temperature control to the desired position. 4. Set the air intake control to the outside (fresh) air position (if equipped). 5. Set the fa ...

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