Kia Optima: Emission Control System

Kia Optima DL3 2019-2022 Service and Repair Manual / Emission Control System

Service data
Specifications

Purge Control Solenoid Valve (PCSV)

▷ Specification

Item
Specification
Coil Resistance (Ω)
22.0 - 26.0 [20°C (68°F)]

Tightening torque
Tightening Torques

Item
kgf.m
N.m
lb-ft
Positive Crankcase Ventilation (PCV) Valve
0.2 - 0.3
1.96 - 2.94
1.45 - 2.17

Description and operation
Description

Emissions Control System consists of three major systems.

Crankcase Emission Control System prevents blow-by gas from releasing into the atmosphere. This system recycles gas back into the intake manifold (Closed Crankcase Ventilation Type).

Evaporative Emission Control System prevents evaporative gas from releasing into the atmosphere. This system burns gas at appropriate engine operating condition after gathering it in the canister.

Exhaust Emission Control System converts the three pollutants [hydrocarbons (HC), carbon monoxide (CO), and oxides of nitrogen (NOx)] into harmless substances by using the 3-way catalytic converter.

Troubleshooting
Troubleshooting

Symptom
Suspect Area
Engine will not start or stuggle to start
Vapor hose damaged or disconnected
Engine stuggle to start
Malfunction of the Purge Control Solenoid Valve
Rough idle or engine stalls
Vapor hose damaged or disconnected
Malfunction of the PCV valve
Rough idle
Malfunction of the Evaporative Emission Control System
Excessive oil consumption
Positive crankcase ventilation line clogged

Schematic diagrams
Schematic Diagram

Components and components location
Components Location

1. PCV valve
2. Canister
3. Purge control solenoid valve (PCSV)
4. Fuel Tank Air Filter
5. Catalytic converter (WCC)
6. Catalytic converter (UCC)
7. Leveling Tube
8. Vapor Hose (Canister ↔ Fuel Tank)
9. Ventilation Hose (Canister ↔ Atmosphere)

1. PCV valve
2. Canister

3. Purge control solenoid valve (PCSV)
4. Fuel Tank Air Filter

5. Catalytic converter (WCC)
6. Catalytic converter (UCC)

7. Leveling Tube
8. Vapor Hose (Canister ↔ Fuel Tank)
9. Ventilation Hose (Canister ↔ Atmosphere)


Starter Relay
Repair procedures Inspection 1. Disconnect the negative battery (-) terminal. 2. Remove the fuse box cover. 3. Remove t ...

Crankcase Emission Control System
Schematic diagrams Schematic Diagram Repair procedures Inspection 1. After disconnecting the vapor hose from the PCV valve, remove the PCV valve. ...

Other information:

Kia Optima DL3 2019-2022 Owner's Manual: Hill-start assist control (HAC)


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Kia Optima DL3 2019-2022 Owner's Manual: Manual climate control system


1. Fan speed control knob 2. Front windshield defroster button 3. Rear window defroster button 4. Air conditioning button 5. Air intake control button 6. Mode selection buttons 7. Temperature control button ✽ NOTICE Operating the blower when the ignition switch is in the ON position coul ...

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