Kia Optima DL3 Quiz

Emission Control System

In this manual: Emission Control System
General Information — 8Advanced Driver Assistance System (ADAS) — 21Maintenance — 27Engine Mechanical System — 45Engine Electrical System — 11Emission Control System — 11Engine Control System/Fuel System — 25Automatic Transmission — 20Drive Shaft and Axle — 7Suspension System — 22Steering — 7Restraints — 11Brake System — 22Body (Interior and Exterior) — 116Body Electrical System — 90Heating, Ventilation, and Air Conditioning — 32
~2min read

Service Data

Specifications

Purge Control Solenoid Valve (PCSV)

▷ Specifications

Item Specification
Coil Resistance (Ω) 22,0–26,0 [20 °C]

Tightening Torque

Tightening torque

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

The emission control system consists of three main systems.

  • The crankcase emission control system prevents crankcase gases from being released into the atmosphere. This system recirculates the gas back to the intake manifold (closed-type crankcase ventilation).

  • The evaporative emission control system prevents fuel vapor from being released into the atmosphere. This system stores the vapor in the canister and burns it when the engine is in the appropriate operating condition.

  • The exhaust emission control system converts the three pollutants [hydrocarbons (HC), carbon monoxide (CO) and nitrogen oxides (NOx)] into harmless substances using the three-way catalytic converter.

Troubleshooting

Troubleshooting

Symptom Suspect area
Engine Does Not Start or Is Difficult to Start Vapor hose damaged or disconnected
Engine Hard to Start Purge control solenoid valve malfunction
Rough idle or engine stalls Vapor hose damaged or disconnected
PCV valve malfunction
Rough idle Evaporative emission control system malfunction
Excessive Oil Consumption PCV hose clogged

Circuit Diagrams

Schematic Diagram

Components and Component Location

Component Location

1. PCV Valve
2. Canister
3. Purge Control Solenoid Valve (PCSV)
4. Fuel Tank Air Filter
5. Catalytic Converter (BCC)		 6. Catalytic Converter (UCC)
7. Equalizer Tube
8. Vapor Hose (Canister ↔ Fuel Tank)
9. Vent Hose (Canister ↔ Atmosphere)

1. PCV Valve 2. Canister
3. Purge Control Solenoid Valve (PCSV) 4. Fuel Tank Air Filter
5. Catalytic Converter (BCC) 6. Catalytic Converter (UCC)
7. Equalizer Tube
8. Vapor Hose (Canister ↔ Fuel Tank)
9. Vent Hose (Canister ↔ Atmosphere)

Test yourself

A quick Kia Optima DL3 quiz: every answer comes with an explanation and a link to the manual page.