2015-2020 Hyundai I20 4 Door Maintenance -> Emission control system User Manual
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Maintenance -> Emission control system for Your Hyundai I20 4 Door Second Generation (2015-2020)

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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.  
1. Crankcase emission control  
system  
2. Evaporative emission control  
system  
The positive crankcase ventilation The Evaporative Emission Control  
system is employed to prevent air System is designed to prevent fuel  
pollution caused by blow-by gases vapors from escaping into the atmos-  
being emitted from the crankcase. phere.  
Your vehicle is equipped with an  
emission control system to meet all  
emission regulations.  
There are three emission control  
systems which are as follows.  
This system supplies fresh filtered air  
to the crankcase through the air  
Canister  
intake hose. Inside the crankcase,  
Fuel vapors generated inside the fuel  
the fresh air mixes with blow-by  
tank are absorbed and stored in the  
gases, which then pass through the  
onboard canister.When the engine is  
PCV valve into the induction system.  
(1) Crankcase emission control sys-  
tem  
(2) Evaporative emission control sys-  
tem  
running, the fuel vapors absorbed in  
the canister are drawn into the surge  
tank through the purge control sole-  
noid valve.  
(3) Exhaust emission control system  
Purge Control Solenoid Valve  
(PCSV)  
In order to assure the proper function  
of the emission control systems, it is  
recommended that you have your  
car inspected and maintained by an  
authorized HYUNDAI dealer in  
accordance with the maintenance  
schedule in this manual.  
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.  
1.1+  
,204/3424-3  
• Do not operate the engine in con-  
fined or closed areas (such as  
garages) any more than what is  
necessary to move the vehicle in or  
out of the area.  
• 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.  
• Never sit in a parked or stopped  
vehicle for any extended time with  
the engine running.  
• When the engine stalls or fails to  
start, excessive attempts to restart  
the engine may cause damage to  
the emission control system.  
Engine exhaust gas precautions  
(carbon monoxide)  
3. Exhaust emission control  
system  
The Exhaust Emission Control  
System is a highly effective system  
which controls exhaust emissions  
while maintaining good vehicle per-  
formance.  
• Carbon monoxide can be present  
with other exhaust fumes.  
Therefore, if you smell exhaust  
fumes of any kind inside your vehi-  
cle, 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.  
Vehicle modifications  
• This vehicle should not be modi-  
fied. Modification of your vehicle  
could affect its performance, safety  
or durability and may even violate  
governmental safety and emis-  
sions regulations.  
WARNING  
In addition, damage or perform-  
ance problems resulting from any  
modification may not be covered  
under warranty.  
Exhaust  
Engine exhaust gases contain  
carbon monoxide (CO). Though  
colorless and odorless, it is dan-  
gerous and could be lethal if  
inhaled. Follow the instructions on  
this page to avoid CO poisoning.  
• If you use unauthorized electronic  
devices, it may cause the vehicle to  
operate abnormally, wire damage,  
battery discharge and fire. For your  
safety, do not use unauthorized  
electronic devices.  
1.1)  
Your vehicle is equipped with a cat- • Avoid driving with a extremely low  
Operating precautions for catalytic  
converters (if equipped)  
alytic converter emission control  
device.  
Therefore, the following precautions  
must be observed:  
• Use only UNLEADED FUEL for  
Petrol engine.  
• Do not operate the vehicle when  
there are signs of engine malfunc-  
tion, such as misfire or a noticeable  
loss of performance.  
fuel level. Running out of fuel could  
cause the engine to misfire, dam-  
aging the catalytic converter.  
WARNING  
Failure to observe these precautions  
could result in damage to the catalyt-  
ic converter and to your vehicle.  
Additionally, such actions could void  
your warranties.  
Fire  
A hot exhaust system can ignite  
flammable items under your  
vehicle. Do not park, idle, or  
drive the vehicle over or near  
flammable objects, such as  
grass,  
vegetation,  
paper,  
• Do not misuse or abuse the  
engine. Examples of misuse are  
coasting with the ignition off and  
descending steep grades in gear  
with the ignition off.  
• Do not operate the engine at high  
idle speed for extended periods (5  
minutes or more).  
• Do not modify or tamper with any  
part of the engine or emission con-  
trol system. All inspections and  
adjustments must be made by an  
authorized HYUNDAI dealer.  
leaves, etc.  
The exhaust system and catalyt-  
ic system are very hot while the  
engine is running or immediate-  
ly after the engine is turned off.  
Keep away from the exhaust  
system and catalytic, you may  
get burned. Also, do not remove  
the heat sink around the  
exhaust system, do not seal the  
bottom of the vehicle or do not  
coat the vehicle for corrosion  
control. It may present a fire risk  
under certain conditions.  
1.1(  

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