2023 HYUNDAI I20 check engine

8-11
08
OBC3N081002AU
ONX4E080005
(1) Low Tyre Pressure Telltale/TPMS
Malfunction Indicator
(2) Low Tyre Pressure Position Telltale
and Tyre Pressure Telltale (Shown on
the LCD display)
Check tyre pressure
ONX4E040019

[You can check the tyre pressure in the
Warning mode on the cluster.
Refer to the “LCD Display Modes” in
chapter 4.

[Tyre pressure is displayed after a few
minutes of driving after initial engine
start up.

[If tyre pressure is not displayed when
the vehicle is stopped, “Drive to
display” message will appear. After
driving, check the tyre pressure.

[The displayed tyre pressure values
may differ from those measured with a
tyre pressure gauge.

[You can change the tyre pressure
unit in the User Settings mode on the
instrument cluster.
- psi, kpa, bar (Refer to “LCD Modes”
in chapter 4).
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8-12
Emergency situations
Tyre pressure monitoring
system
WARNING
Over-inflation or under-inflation can
reduce tyre life, adversely affect
vehicle handling, and lead to sudden
tyre failure that may cause loss of
vehicle control resulting in an accident.
Each tyre, including the spare (if
provided), should be checked monthly
when cold and inflated to the inflation
pressure recommended by the vehicle
manufacturer on the vehicle placard
or tyre inflation pressure label. (If your
vehicle has tyres of a different size
than the size indicated on the vehicle
placard or tyre inflation pressure label,
you should determine the proper tyre
inflation pressure for those tyres.)
As an added safety feature, your
vehicle has been equipped with a tyre
pressure monitoring system (TPMS)
that illuminates a low tyre pressure
telltale when one or more of your
tyres is significantly under-inflated.
Accordingly, when the low tyre pressure
telltale illuminates, you should stop and
check your tyres as soon as possible,
and inflate them to the proper pressure.
Driving on a significantly under-inflated
tyre causes the tyre to overheat and can
lead to tyre failure.
Under-inflation also reduces fuel
efficiency and tyre tread life, and
may affect the vehicle’s handling and
stopping ability.
Please note that the TPMS is not a
substitute for proper tyre maintenance,
and it is the driver’s responsibility to
maintain correct tyre pressure, even if
under-inflation has not reached the level
to trigger illumination of the TPMS low
tyre pressure telltale.
Your vehicle has also been equipped
with a TPMS malfunction indicator
to indicate when the system is
not operating properly. The TPMS
malfunction indicator is combined with
the low tyre pressure telltale. When
the system detects a malfunction, the
telltale will flash for approximately one
minute and then remain continuously
illuminated. This sequence will continue
upon subsequent vehicle start-ups as
long as the malfunction exists.
When the malfunction indicator is
illuminated, the system may not be able
to detect or signal low tyre pressure as
intended. TPMS malfunctions may occur
for a variety of reasons, including the
installation of replacement or alternate
tyres or wheels on the vehicle that
prevent the TPMS from functioning
properly.
Always check the TPMS malfunction
telltale after replacing one or more tyres
or wheels on your vehicle to ensure that
the replacement or alternate tyres and
wheels allow the TPMS to continue to
function properly.
NOTICE
If any of the below happens, we
recommend that you have the system
checked by a HYUNDAI authorised
repairer.
1. The Low Tyre Pressure Telltale/
TPMS Malfunction Indicator does not
illuminate for 3 seconds when the
Engine Start/Stop button is pressed
to the ON position or when the
engine is running.
2. The TPMS Malfunction Indicator
remains illuminated after blinking for
approximately 1 minute.
3. The Low Tyre Pressure Position
Telltale remains illuminated.

8-30
Emergency situations
ODN8079020
5. Insert the sealant bottle into the
housing (5) of the compressor so that
the bottle is upright.
6. Ensure that the compressor is
switched off, position 0.
OBC3080011
NOTICE
Securely install the sealant filling hose
to the valve. If not, sealant may flow
backward, possibly clogging the filling
hose.
OBC3N080005
7. Connect between compressor and the
vehicle power outlet using the cable
and connectors (4).
8. With the engine start/stop button
position on or ignition switch position
on, switch on the compressor and let
it run for approximately 5~7 minutes to
fill the sealant up to proper pressure.
(refer to immediately chapter 2).
The inflation pressure of the tyre
immediately filling is unimportant and
will be checked/corrected later.
Be careful not to overinflate the tyre
and stay away from the tyre whilst
filling it.
NOTICE
- Tyre pressure
Do not attempt to drive your vehicle
if the tyre pressure is below 29
PSI(200kpa). This could result in an
accident due to sudden tyre failure.
9. Switch off the compressor.
10. Detach the hoses from the sealant
bottle connector and from the tyre
valve.
Return the Tyre Mobility Kit to its storage
location in the vehicle.

Engine compartment ...................................................................................... 9-3
Maintenance services .....................................................................................9-6
Owner’s responsibility .............................................................................................. 9-6
Owner maintenance precautions............................................................................. 9-6
Owner maintenance ....................................................................................... 9-7Owner maintenance schedule ..................................................................................9-7
Scheduled maintenance services ..................................................................9-9
Explanation of scheduled maintenance items ........................................... 9-10
Engine oil ........................................................................................................9-13
Checking the engine oil level .................................................................................. 9-13
Checking the engine oil and filter ........................................................................... 9-15
Engine coolant ...............................................................................................9-16Checking the coolant level ...................................................................................... 9-16
Changing the engine coolant .................................................................................. 9-19
Brake/clutch fluid ......................................................................................... 9-20Checking the brake/clutch fluid level .................................................................... 9-20
Intelligent Manual Transmission (iMT) System actuator fluid ................... 9-22Checking the IMT system actuator fluid level ....................................................... 9-22
Washer fluid .................................................................................................. 9-23Checking the washer fluid level ............................................................................. 9-23
Checking the parking brake ................................................................................... 9-23
Parking brake ................................................................................................ 9-23
Air cleaner ..................................................................................................... 9-24
Filter replacement ................................................................................................... 9-24
Climate control air filter................................................................................ 9-26Filter inspection ....................................................................................................... 9-26
Filter replacement ................................................................................................... 9-26
Wiper blades ................................................................................................. 9-27Blade inspection .......................................................................................................9-27
Blade replacement ...................................................................................................9-27
9. Maintenance
9

9
Battery ........................................................................................................... 9-29For best battery service .......................................................................................... 9-30
Battery capacity label .............................................................................................. 9-31
Battery recharging ................................................................................................... 9-31
Reset items .............................................................................................................. 9-32
Tyres and wheels ........................................................................................... 9-33Tyre care ................................................................................................................... 9-33
Recommended cold tyre inflation pressures ........................................................ 9-34
Check tyre inflation pressure ................................................................................. 9-34
Tyre rotation ............................................................................................................. 9-35
Wheel alignment and tyre balance ........................................................................ 9-36
Tyre replacement..................................................................................................... 9-36
Wheel replacement ................................................................................................. 9-38
Tyre traction ............................................................................................................. 9-38
Tyre maintenance .................................................................................................... 9-38
Tyre sidewall labelling ............................................................................................. 9-38
Low aspect ratio tyres ..............................................................................................9-41
Fuses .............................................................................................................. 9-42Instrument panel fuse replacement ...................................................................... 9-43
Engine compartment panel fuse replacement ..................................................... 9-44
Fuse/relay panel description .................................................................................. 9-45
Light bulbs .....................................................................................................9-59Headlight, Position Light, Turn signal Light bulb replacement ............................9-60
Headlight and front fog light aiming (For Europe) ................................................ 9-65
Side repeater light replacement ............................................................................ 9-70
Rear combination light bulb replacement ............................................................. 9-71
High mounted stop light replacement .................................................................. 9-78
License plate light bulb replacement .................................................................... 9-78
Interior light bulb replacement .............................................................................. 9-79
Appearance care .......................................................................................... 9-80Exterior care ............................................................................................................9-80
Interior care ............................................................................................................. 9-85
Emission control system.............................................................................. 9-88Crankcase emission control system ......................................................................9-88
Evaporative emission control system ....................................................................9-88
Exhaust emission control system ...........................................................................9-89

9-7
09
WARNING
Performing maintenance work on a
vehicle can be dangerous. If you lack
sufficient knowledge and experience
or the proper tools and equipment
to do the work, we recommend that
the system be serviced by a HYUNDAI
authorised repairer. ALWAYS follow
these precautions for performing
maintenance work:

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move the shift lever into the P (Park,
for automatic transmission/dual
clutch transmission vehicle) position,
apply the parking brake, and place
the ignition switch in the LOCK/OFF
position.

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prevent the vehicle from moving.
Remove loose clothing or jewellery
that can become entangled in
moving parts.

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maintenance, do so out doors or in an
area with plenty of ventilation.

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materials away from the battery and
fuel-related parts.The following lists are vehicle checks
and inspections that should be
performed by the owner or a HYUNDAI
authorised repairer at the frequencies
indicated to help ensure safe,
dependable operation of your vehicle.
Any adverse conditions should be
brought to the attention of your dealer
as soon as possible.
These Owner Maintenance vehicle
checks are generally not covered by
warranties and you may be charged for
labour, parts and lubricants used.
Owner maintenance schedule
When you stop for fuel:

[Check the coolant level in the engine
coolant reservoir.

[Check the windscreen washer fluid
level.

[Check for low or under-inflated tyres.

[Check the radiator and condenser.
Check if the front of the radiator and
condenser are clean and not blocked
with leaves, dirt or insects, etc.
If any of the above parts are extremely
dirty or you are not sure of their
condition, we recommend that
you contact a HYUNDAI authorised
repairer.
WARNING
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coolant level when the engine is hot.
This may result in coolant being blown
out of the opening and cause serious
burns and other injuries.
OWNER MAINTENANCE

9-8
Maintenance
Whilst operating your vehicle:

[Note any changes in the sound of the
exhaust or any smell of exhaust fumes
in the vehicle.

[Check for vibrations in the steering
wheel. Notice if there is any increased
steering effort or looseness in the
steering wheel, or change in its
straight-ahead position.

[Notice if your vehicle constantly turns
slightly or “pulls” to one side when
travelling on smooth, level road.

[When stopping, listen and check for
unusual sounds, pulling to one side,
increased brake pedal travel or “hard-
to-push” brake pedal.

[If any slipping or changes in the
operation of your transmission occurs,
check the transmission fluid level.

[Check the parking brake.

[Check for fluid leaks under your
vehicle (water dripping from the air
conditioning system during or after
use is normal).
At least monthly:

[Check coolant level in the engine
coolant reservoir.

[Check the operation of all exterior
lights, including the stoplights, turn
signals and hazard warning flashers.

[Check the inflation pressures of all
tyres including the spare for tyres that
are worn, show uneven wear, or are
damaged.

[Check for loose wheel lug nuts.
At least twice a year:
(i.e., every Spring and Autumn)

[Check radiator, heater and air
conditioning hoses for leaks or
damage.

[Check windscreen washer spray and
wiper operation. Clean wiper blades
with a clean cloth dampened with
washer fluid.

[Check headlight alignment.

[Check muffler, exhaust pipes, shields
and clamps.

[Check the seat belts for wear and
function.
At least once a year:

[Clean body and door drain holes.

[Lubricate door hinges and bonnet
hinges.

[Lubricate door and bonnet locks and
latches.

[Lubricate door rubber weather strips.

[Lubricate door checker

[Check the air conditioning system.

[Inspect and lubricate automatic
transmission linkage and controls.

[Clean the battery and terminals.

[Check the brake fluid level.

9-10
Maintenance
Engine oil and filter
The engine oil and filter should be
changed at the intervals specified in the
maintenance schedule. If the vehicle
is being driven in severe conditions,
more frequent oil and filter changes are
required.
Drive belts
Inspect all drive belts for evidence
of cuts, cracks, excessive wear or oil
saturation and replace if necessary.
Drive belts should be checked
periodically for proper tension and
adjusted as necessary.
CAUTION
When you are inspecting the belt, place
the ignition switch to the lock/off or
ACC position.
Fuel filter (Except Europe)
A clogged filter can limit the speed
at which the vehicle may be driven,
damage the emission system and cause
multiple issues such as hard starting.
If an excessive amount of foreign
matter accumulates in the fuel tank, the
filter may require replacement more
frequently.
After installing a new filter, run the
engine for several minutes, and
check for leaks at the connections.
We recommend that the fuel filter be
replaced by a HYUNDAI authorised
repairer.
Fuel filter (For Europe)
This petrol powered vehicle is equipped
with a lifetime fuel filter that is
integrated with the fuel tank. Regular
maintenance or replacement is not
needed; however, the quality of fuel
used may impact the frequency of
maintenance needed. If there are any
fuel related problems like fuel flow
restriction, surging, loss of power,
hard starting problem etc, fuel filter
inspection or replacement may be
needed. We recommend the fuel filter
be inspected or replaced by a HYUNDAI
authorised repairer.
Fuel lines, fuel hoses and
connections
Check the fuel lines, fuel hoses and
connections for leakage and damage.
We recommend that the fuel lines, fuel
hoses and connections be replaced by a
HYUNDAI authorised repairer.
Vapour hose and fuel filler cap
The vapour hose and fuel filler cap
should be inspected at those intervals
specified in the maintenance schedule.
Make sure that a new vapour hose or
fuel filler cap is correctly replaced.
EXPLANATION OF SCHEDULED MAINTENANCE ITEMS