Get Maintenance -> Emission control system Guide for Hyundai Bayon SUV Second Generation (2021-2024)

EMISSION CONTROL SYSTEM

The emission control system of your

vehicle is covered by a written limited

warranty. Please see the warranty in-

formation contained in the Service

Passport in your vehicle.

Your vehicle is equipped with an emis-

sion control system to meet all emis-

sion regulations.

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 induc-

tion system.

There are three emission control sys-

tems which are as follows.

(1) Crankcase emission control system

(2) Evaporative emission control sys-

2. Evaporative emission

control system

tem

(3) Exhaust emission control system

The Evaporative Emission Control Sys-

tem is designed to prevent fuel vapours

from escaping into the atmosphere.

In order to ensure the proper function of

the emission control systems, it is rec-

ommended that you have your car in-

spected and maintained by a HYUNDAI

authorised repairer in accordance with

the maintenance schedule.

Canister

Fuel vapours generated inside the fuel

tank are absorbed and stored in the on-

board canister. When the engine is run-

ning, 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 Con-

trol (ESC) system)

• To prevent the vehicle from misfir-

ing during dynamometer testing,

turn the Electronic Stability Con-

trol (ESC) system off by pressing

the ESC switch.

• After dynamometer testing is com-

pleted, turn the ESC system back

on by pressing the ESC switch

again.

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Maintenance

Purge Control Solenoid Valve

(PCSV)

WARNING

Engine exhaust gases contain car-

bon monoxide (CO). Though colour-

less and odourless, it is dangerous

and could be lethal if inhaled. Follow

the instructions following to avoid

CO poisoning.

The purge control solenoid valve is

controlled by the Engine Control Mod-

ule (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 en-

gine warms-up during ordinary driving,

the PCSV opens to introduce evapo-

rated fuel to the engine.

• 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.

• 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 ve-

hicle 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.

3. Exhaust emission control

system

The Exhaust Emission Control System

is a highly effective system which con-

trols exhaust emissions whilst main-

taining good vehicle performance.

Engine exhaust gas precautions

(carbon monoxide)

• Carbon monoxide can be present

with other exhaust fumes. Therefore,

if you smell exhaust fumes of any

kind inside your vehicle, have it in-

spected 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.

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Your vehicle is equipped with a catalyt-

Operating precautions for cata-

lytic converters (if equipped)

ic converter emission control device.

Therefore, the following precautions

must be observed:

• Use only UNLEADED FUEL for petrol

engines.

• Do not operate the vehicle when

there are signs of engine malfunction,

such as misfire or a noticeable loss of

performance.

WARNING

The exhaust system and catalytic

system are very hot whilst the en-

gine is running or immediately after

the engine is turned off. To avoid SE-

RIOUS INJURY or DEATH:

• Do not park, idle, or drive the ve-

hicle over or near flammable ob-

jects, such as grass, vegetation,

paper, leaves, etc. A hot exhaust

system can ignite flammable

items under your vehicle.

• Do not misuse or abuse the engine.

Examples of misuse are coasting

with the engine off and descending

steep grades in gear with the engine

off.

• Do not operate the engine at high idle

speed for extended periods (5 min-

utes or more).

• Do not modify or tamper with any part

of the engine or emission control sys-

tem. We recommend that all inspec-

tions and adjustments are made by a

HYUNDAI authorised repairer.

• Avoid driving with a very low fuel lev-

el. If you run out of petrol, it could

cause the engine to misfire and result

in excessive loading of the catalytic

converter.

• Keep away from the exhaust

system and catalytic converter

or you may get burned. Also, do

not emove the heat sink around

the exhaust system, do not seal

the bottom of the vehicle, and

do not coat the vehicle for corro-

sion control. It may present a

fire risk under certain condi-

tions.

Failure to observe these precautions

could result in damage to the catalytic

converter and to your vehicle. Addition-

ally, such actions could void your war-

ranties.

9-81

Maintenance

Petrol Particulate Filter (GPF)

(if equipped)

The Petrol Particulate Filter (GPF) sys-

tem removes the soot in the exhaust

gas.

The GPF system automatically burns

(or oxidizes) the accumulated soot in

accordance with driving situations, un-

like 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.

WARNING

Petrol Fuel

(if equipped with GPF)

We recommend you to use only the

regulated petrol fuels, when your ve-

hicle is equipped with the GPF sys-

tem.

When you use other petrol fuels

which contain unspecified additives,

they may damage the GPF system

and cause exhaust emission prob-

lems.

However, when the vehicle is continu-

ally driven at repeated short distances

or driven at low speed for a long time,

the accumulated soot may not be auto-

matically removed because of low ex-

haust gas temperature. In this case, the

accumulated soot may reach a certain

amount regardless of the soot oxidiza-

tion process, then the GPF light will il-

luminate.

The Petrol Particulate Filter (GPF) Light

stops illuminating, when the driving

speed exceeds 50 mph (80 km/h) with

engine RPM 1,500 ~ 4,000 and the

gear in the 3rd position or above for

about 30 minutes.

When the GPF light starts to blink or the

waning message “Check exhaust sys-

tem” pops up even though the vehicle

was driven as mentioned above, we

recommend that you have the GPF

system checked by a HYUNDAI autho-

rised repairer.

With the GPF light blinking for an ex-

tended period of time, it may damage

the GPF system and lower the fuel

economy.

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Maintenance -> Emission control system for Your Hyundai Bayon SUV Second Generation (2021-2024)

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