Kia Stonic Quiz

Emission control system

In this manual: Emission control system
General Information — 8Maintenance — 31Engine Mechanical — 49Engine Electrical — 15Emission control system — 11Engine Control System/Fuel System — 45Clutch System — 12Manual Transaxle System — 11DCT (Dual Clutch Transmission) System — 16Drive Shafts and Axles — 9Suspension — 16Steering — 10restraint system — 15Braking system — 22Body (Interior and Exterior) — 89Rear Seat — 16Electrical System — 25Electrochromic Interior Rear View Mirror — 64Heating, Ventilation, and Air Conditioning — 31
~1min read

Components and Components Location

COMPONENT LOCATION

1. PCV valve
2. Charcoal canister
3. Purge control solenoid valve (PCSV)
4. Warm-up catalytic converter (WCC)
5. Underfloor catalytic converter (UCC)		 6. Compensation hose
7. Vapor hose (charcoal canister ↔ intake manifold)
8. Vapor hose (charcoal canister ↔ fuel tank)
9. Ventilation hose (charcoal canister ↔ air cleaner)
10. Ventilation hose (air cleaner ↔ air pressure)

1. PCV Valve 2. Charcoal canister
3. Purge control solenoid valve (PCSV) 4. Catalytic converter (WCC)
5. Catalytic converter (UCC)
6. Compensation hose
7. Vapor hose (charcoal canister ↔ intake manifold)
8. Vapor hose (charcoal canister ↔ fuel tank)
9. Ventilation hose (charcoal canister ↔ air cleaner)
10. Ventilation hose (air cleaner ↔ air pressure)

Description and Operation

Description

Exhaust emission control consists of three main systems.

  • The crankcase ventilation system prevents blow-by gases from escaping into the atmosphere. This system returns the gas to the intake manifold (closed crankcase ventilation).

  • The evaporative emission control system prevents fuel vapors from escaping into the atmosphere. This system burns the collected gas under appropriate engine operating conditions after it has been stored in the charcoal canister.

  • Exhaust gas purification converts the three pollutants [hydrocarbons (HC), carbon monoxide (CO) and nitrogen oxides (NOx)] into harmless substances using a three-way catalytic converter.

Schematic diagrams

CIRCUIT DIAGRAM

Troubleshooting

Troubleshooting

Problem Possible Cause
Engine does not start or has starting problems Vacuum hose damaged or pinched
Hard engine start Purge valve malfunction
Rough idle or engine stalls Vacuum hose damaged or pinched
PCV valve malfunction
Rough idle Evaporative emission control system malfunction
Excessive Oil Consumption Crankcase ventilation line blocked

Test yourself

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