Kia SORENTO HEV 2023 Manual page 633

Maintenance
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
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
system
The Evaporative Emission Control Sys-
tem is designed to prevent fuel vapours
from escaping into the atmosphere.
Canister
Fuel vapours generated inside the fuel
tank are absorbed and stored in the
onboard canister. When the engine is
running, the fuel vapours 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
exhaust emissions whilst maintaining
good vehicle performance.
Engine exhaust gas precautions
(carbon monoxide)
僅 Carbon monoxide can be present with
other exhaust fumes. Therefore, 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 immedi-
ately.
WARNING
Exhaust
Engine exhaust gases contain carbon
monoxide (CO). Though colourless and
odourless, it is dangerous and could be
lethal if inhaled. Follow the instructions
on this page to avoid CO poisoning.
僅 Do not operate the engine in confined
or closed areas (such as garages) any
more than what is necessary to move
the vehicle in or out of the area.
僅 When the vehicle is stopped in an
open area for more than a short time
with the engine running, adjust the
ventilation system (as needed) to
draw outside air into the vehicle.
僅 Never sit in a parked or stopped vehi-
cle for any extended time with the
engine running.
僅 When the engine stalls or fails to start,
excessive attempts to restart the
Emission control system
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