2023 HYUNDAI I20 Exhaust

9-88
Maintenance
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.
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
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.
NOTICE
For the Inspection and Maintenance
Test (with Electronic Stability Control
(ESC) system)

[ 7RSUHYHQWWKHYHKLFOHIURPPLVILULQJ
during dynamometer testing, turn
the Electronic Stability Control
(ESC) system off by pressing the ESC
switch.

[ $IWHUG\QDPRPHWHUWHVWLQJLV
completed, turn the ESC system back
on by pressing the ESC switch again.
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.
2. Evaporative emission control
system
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.
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.
(0,66,21&21752/6<67(0

9-89
09
3. Exhaust emission control
system
The Exhaust Emission Control System is
a highly effective system which controls
exhaust emissions whilst maintaining
good vehicle performance.
Engine exhaust gas precautions
(carbon monoxide)

[ &DUERQPRQR[LGHFDQEHSUHVHQWZLWK
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.

[ 'RQRWRSHUDWHWKHHQJLQHLQFRQILQHG
or closed areas (such as garages) any
more than what is necessary to move
the vehicle in or out of the area.

[ :KHQWKHYHKLFOHLVVWRSSHGLQDQ
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.

[ 1HYHUVLWLQDSDUNHGRUVWRSSHG
vehicle for any extended time with the
engine running.

[ :KHQWKHHQJLQHVWDOOVRUIDLOVWR
start, excessive attempts to restart
the engine may cause damage to the
emission control system.
Operating precautions for catalytic
converters (if equipped)
WARNING

[ $KRWH[KDXVWV\VWHPFDQLJQLWH
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.

[ 7KHH[KDXVWV\VWHPDQGFDWDO\WLF
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.
Your vehicle is equipped with a catalytic
converter emission control device.
Therefore, the following precautions
must be observed:

[ 8VHRQO\81/($'(')8(/IRUSHWURO
engines.

[ 'RQRWRSHUDWHWKHYHKLFOHZKHQ
there are signs of engine malfunction,
such as misfire or a noticeable loss of
performance.

[ 'RQRWPLVXVHRUDEXVHWKHHQJLQH
Examples of misuse are coasting with
the engine off and descending steep
grades in gear with the engine off.

[ 'RQRWRSHUDWHWKHHQJLQHDWKLJKLGOH
speed for extended periods (5 minutes
or more).

[ 'RQRWPRGLI\RUWDPSHUZLWKDQ\
part of the engine or emission control
system. We recommend that all
inspections and adjustments are
made by a HYUNDAI authorised
repairer.

9-90
Maintenance

[ $YRLGGULYLQJZLWKDYHU\ORZIXHO
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.
Petrol Particulate Filter (GPF)
(if equipped)
The Petrol Particulate Filter (GPF) system
removes the soot in the exhaust gas.
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.
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.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.
WARNING
Petrol Fuel
(if equipped with GPF)
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.