Get Maintenance -> Emission control system Guide for 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.

9-88

Operating precautions for catalytic

converters (if equipped)

3. Exhaust emission control

system

The Exhaust Emission Control System is

a highly effective system which controls

exhaust emissions whilst maintaining

good vehicle performance.

WARNING

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flammable items under your vehicle.

Do not park, idle, or drive the vehicle

over or near flammable objects, such

as dry grass, paper, leaves, etc.

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system are very hot whilst the engine

is running or immediately after the

engine is turned off. Keep away from

the exhaust system and catalytic

converter as you may get burned.

Also, do not remove the heat sink

around the exhaust system, do not

seal the bottom of the vehicle and

do not coat the vehicle for corrosion

control. It may present a fire risk

under certain conditions.

Engine exhaust gas precautions

(carbon monoxide)

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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

immediately.

WARNING

Engine exhaust gases contain carbon

monoxide (CO). Though colourless and

odourless, it is dangerous and could be

lethal if inhaled. Follow the instructions

following to avoid CO poisoning.

Your vehicle is equipped with a catalytic

converter emission control device.

Therefore, the following precautions

must be observed:

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engines.

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or closed areas (such as garages) any

more than what is necessary to move

the vehicle in or out of the area.

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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.

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there are signs of engine malfunction,

such as misfire or a noticeable loss of

performance.

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Examples of misuse are coasting with

the engine off and descending steep

grades in gear with the engine off.

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speed for extended periods (5 minutes

or more).

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vehicle for any extended time with the

engine running.

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part of the engine or emission control

system. We recommend that all

inspections and adjustments are

made by a HYUNDAI authorised

repairer.

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start, excessive attempts to restart

the engine may cause damage to the

emission control system.

9-89

Maintenance

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level. If you run out of petrol, it could

cause the engine to misfire and result

in excessive loading of the catalytic

converter.

Failure to observe these precautions

could result in damage to the catalytic

converter and to your vehicle.

Additionally, such actions could void

your warranties.

When the GPF lamp starts to blink or

the waning message “Check exhaust

system” pops up even though the

vehicle was driven as mentioned above,

we recommend that you have the

GPF system checked by a HYUNDAI

authorised repairer.

With the GPF lamp blinking for an

extended period of time, it may damage

the GPF system and lower the fuel

economy.

Petrol Particulate Filter (GPF)

(if equipped)

The Petrol Particulate Filter (GPF) system

removes the soot in the exhaust gas.

WARNING

Petrol Fuel

(if equipped with GPF)

The GPF system automatically burns

(or oxidizes) the accumulated soot in

accordance with driving situations,

unlike a disposable air filter.

In other words, the accumulated soot is

automatically purged out by the engine

control system and by the high exhaust-

gas temperature at normal/ high driving

speeds.

We recommend you to use only the

regulated petrol fuels, when your

vehicle is equipped with the GPF

system.

When you use other petrol fuels which

contain unspecified additives, they

may damage the GPF system and cause

exhaust emission problems.

However, when the vehicle is continually

driven at repeated short distances or

driven at low speed for a long time,

the accumulated soot may not be

automatically removed because of low

exhaust gas temperature. In this case,

the accumulated soot may reach a

certain amount regardless of the soot

oxidization process, then the GPF lamp

will illuminate.

The Petrol Particulate Filter (GPF) Lamp

stops illuminating, when the driving

speed exceeds 80 km/h (50 mph) with

the engine at 1,500- 4,000 rpm and the

gear in the 3rd position or above for

approximately 30 minutes.

9-90

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

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