Emission Control System - Kia Soul 2023 Manual

Maintenance

Emission control system

The emission control system of your
vehicle is covered by a written limited
warranty. Please see the warranty infor-
mation contained in the Warranty &
Consumer Information manual in your
vehicle.
Your vehicle is equipped with an emis-
sion control system to meet all applica-
ble emission regulations. There are three
emission control systems, as follows.
1. Crankcase emission control system
2. Evaporative emission control system
3. Exhaust emission control system
In order to assure the proper function of
the emission control systems, it is rec-
ommended that you have your vehicle
inspected and maintained by an autho-
rized Kia dealer in accordance with the
maintenance schedule in this manual.
Caution for the Inspection and
Maintenance Test (With Elec-
tronic Stability Control (ESC) sys-
tem)
僅 To prevent the vehicle from misfir-
ing during dynamometer testing,
turn the Electronic Stability Control
(ESC) system off by pressing the
ESC switch.
僅 After dynamometer testing is com-
pleted, turn the ESC system back on
by pressing the ESC switch again.
1. Crankcase emission control
system
The positive crankcase ventilation sys-
tem is employed to prevent air pollution
caused by blow-by gases being emitted
from the crankcase. This system sup-
plies fresh filtered air to the crankcase
7 66
through the air intake hose. Inside the
crankcase, the fresh air mixes with blow-
by gases, which then pass through the
PCV valve into the induction system.
2. Evaporative emission control
(including ORVR: Onboard Refu-
eling Vapor Recovery) system
The Evaporative Emission Control Sys-
tem is designed to prevent fuel vapors
from escaping into the atmosphere. (The
ORVR system is designed to allow the
vapors from the fuel tank to be loaded
into a canister while refueling at the gas
station, preventing the escape of fuel
vapors into the atmosphere.)
Canister
Fuel vapors generated inside the fuel
tank are absorbed and stored in the
onboard canister. When the engine is
running, the fuel vapors absorbed in the
canister are drawn into the surge tank
through the purge control solenoid
valve.
Purge Control Solenoid Valve
(PCSV)
The purge control solenoid valve is con-
trolled by the Engine Control Module
(ECM); when the engine coolant tem-
perature is low during idling, the PCSV
closes so that evaporated fuel is not
taken into the engine. After the engine
warms up during ordinary driving, the
PCSV opens to introduce evaporated
fuel to the engine.
3. Exhaust emission control sys-
tem
The Exhaust Emission Control System is
a highly effective system which controls
Emission control system