Kia Soul 2022 Owner's Manual page 521

Maintenance
back on by pressing the ESC
switch again.
1. Crankcase emission control sys -
tem
The positive crankcase ventilation
system is employed to prevent air
pollution caused by blow-by gases
being emitted from the crankcase.
This system supplies fresh filtered
air to the crankcase 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 Refuel -
ing Vapor Recovery) system
The Evaporative Emission Control
System 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
controlled by the Engine Control
Module (ECM); when the engine
coolant temperature is low during
idling, the PCSV closes so that evap -
orated 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 system
The Exhaust Emission Control Sys -
tem is a highly effective system
which controls exhaust emissions
while maintaining good vehicle per -
formance.
Engine exhaust gas precautions
(carbon monoxide)
Carbon monoxide can be present
with other exhaust fumes. There -
fore, if you smell exhaust fumes
of any kind inside your vehicle,
have it inspected and repaired
immediately. If you ever suspect
exhaust fumes are coming into
your vehicle, drive it only with all
the windows fully open. Have your
vehicle checked and repaired
immediately.
WARNING
Exhaust
Engine exhaust gases contain car -
bon monoxide (CO). Though color -
less and odorless, it is dangerous
Emission control system
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