Kia Carnival 2022 Owner's Manual page 653

Maintenance
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
Positive Crankcase Ventilation (PCV)
valve into the induction system.
2. Evaporative emission control
(including Onboard Refueling Vapor
Recovery (ORVR)) 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
(PCSV) is controlled by the Engine
Control Module (ECM); when the
engine coolant temperature 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 evapo -
rated 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.
Vehicle modifications
This vehicle should not be modified.
Modification of your vehicle could
affect its performance, safety or
durability and may even violate gov -
ernmental safety and emissions
regulations. In addition, damage or
performance problems resulting
from any modification may not be
covered under warranty.
If you use authorized electronic
devices, it may cause the vehicle
to operate abnormally, wire dam -
age, battery discharge and fire.
For your safety, do not use unau -
thorized electronic devices.
Emission control system
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