Maintenance -> Crankcase emission control system for Your Hyundai I20 4 Door 2021-2026

Maintenance  
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The emission control system of your  
vehicle is covered by a written limited  
warranty. Please see the warranty  
information contained in the Service  
Passport in your vehicle.  
Your vehicle is equipped with an  
emission control system to meet all  
emission regulations.  
1. Crankcase emission control  
system  
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.  
There are three emission control systems  
which are as follows.  
(1) Crankcase emission control system  
(2) Evaporative emission control system  
(3) Exhaust emission control system  
2. Evaporative emission control  
system  
In order to ensure the proper function  
of the emission control systems, it is  
recommended that you have your car  
inspected and maintained by a HYUNDAI  
authorised repairer in accordance  
with the maintenance schedule in this  
manual.  
The Evaporative Emission Control  
System 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.  
NOTICE  
For the Inspection and Maintenance  
Test (with Electronic Stability Control  
(ESC) system)  
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during dynamometer testing, turn  
the Electronic Stability Control  
(ESC) system off by pressing the ESC  
switch.  
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completed, turn the ESC system back  
on by pressing the ESC switch again.  
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 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.  
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