check engine HYUNDAI I20 2023 Owners Manual

01
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Petrol engine
Unleaded
For the optimal vehicle performance, we recommend you use unleaded petrol which
has an octane rating of RON (Research Octane Number) 95 / AKI (Anti Knock Index)
91 or higher. You may use unleaded petrol with an octane rating of RON 91-94 / AKI
87-90 but it may result in slight performance reduction of the vehicle. (Do not use
methanol blended fuels)
Your new vehicle is designed to obtain maximum performance with UNLEADED FUEL,
as well as minimise exhaust emissions and spark plug fouling.
CAUTION
NEVER USE LEADED FUEL. The use of leaded fuel is detrimental to the catalytic
converter and will damage the engine control system’s oxygen sensor and affect
emission control.
Never add any fuel system cleaning agents to the fuel tank other than what has
been specified (We recommend that you consult a HYUNDAI authorised repairer for
details.)
WARNING

[Do not “top off” after the nozzle automatically shuts off when refuelling.

[Always check that the fuel cap is installed securely to prevent fuel spillage in the
event of an accident.

2-22
Vehicle information
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before checking or draining any lubricant. This is especially important in dusty or
sandy areas and when the vehicle is used on unpaved roads. Cleaning the plug
and dipstick areas will prevent dirt and grit from entering the engine and other
mechanisms that could be damaged.
Engine oil viscosity (thickness) has an effect on fuel economy and cold weather
operating (engine start and engine oil flowability). Lower viscosity engine oils can
provide better fuel economy and cold weather performance, however, higher
viscosity engine oils are required for satisfactory lubrication in hot weather. Using oils
of any viscosity other than those recommended could result in engine damage.
When choosing an oil, consider the range of temperature your vehicle will be
operated in before the next oil change.
Proceed to select the recommended oil viscosity from the chart.
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Temperature°C -30 -20 -10 0 10 20 30 40 50
(°F) -10 0 20 40 60 80 100 120
Smartstream G1.2/
G1.0 T-GDI/48V MHEV *
10W-20
Gasoline 1.4 *1
0/5W-20, 0/5W-30
10W-30
15W-40
20W-50
*1 : If mineral oil or semi-synthetic oil is used, it is a severe maintenance condition in terms of
engine oil change.
An engine oil displaying this American Petroleum Institute(API)
Certification Mark conforms to the International Lubricant
Specification Advisory Committee (ILSAC). It is recommended
to only use engine oils that uphold this API Certification Mark.

3-48
Safety system
How does the air bags system
operate?
OBC3030023R
The SRS consists of the following
components:
(1) Driver’s front air bag module
(2) Passenger’s front air bag module*
(3) Side air bag modules*
(4) Curtain air bag modules*
(5) Retractor pre-tensioner assemblies*
(6) Air bag warning light
(7) SRS control module (SRSCM)
(8) Front impact sensors
(9) Side impact sensors*
(10) Side pressure sensors*
(11) Passenger’s front air bag OFF
indicator (front passenger’s seat
only) *
(12) Passenger’s front air bag ON/OFF
switch *
* : if equipped
The SRSCM continually monitors SRS
components whilst the ignition switch
is in the ON position to determine if a
crash impact is severe enough to require
air bag deployment or pre-tensioner seat
belt deployment.
SRS warning light
The SRS (Supplement Restraint System)
air bag warning light on the instrument
panel displays the air bag symbol
depicted in the illustration. The system
checks the air bag electrical system for
malfunctions. The light indicates that
there is a potential problem with your air
bag system.
WARNING
If your SRS malfunctions, the air bag
may not inflate properly during an
accident increasing the risk of serious
injury or death.
If any of the following conditions occur,
your SRS is malfunctioning:

[The light does not turn on for
approximately six seconds when the
ignition switch is in the ON position.

[The light stays on after illuminating
for approximately six seconds.

[The light comes on whilst the vehicle
is in motion.

[The light blinks when the engine is
running.
We recommend that a HYUNDAI
authorised repairer inspect the SRS
as soon as possible if any of these
conditions occur.

4-10
Instrument cluster
Dual clutch transmission shift
indicator (if equipped)
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OBC3040011R
„3.5-Inch

„10.25-Inch
This indicator displays which shift lever
position is selected.

[Park :P

[Reverse : R

[Neutral : N

[Drive :D

[Manual shift mode : D1, D2, D3, D4,
D5, D6, D7
Warning and indicator lights
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Air bag warning light
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When you set the Engine Start/Stop
button to the ON position. The air bag
warning light illuminates for about 6
seconds and then turns off when all
checks have been performed.
The air bag warning light will remain
illuminated if there is a malfunction with
the Safety Restraint System (SRS) air bag
operation.
If this occurs, we recommend that
you have the vehicle inspected by a
HYUNDAI authorised repairer.
Seat warning light
This warning light informs the driver and
front passenger that the seat belt is not
fastened.
For more details, refer to the “Seat
Belts” in chapter 3.

4-11
04
Parking Brake & Brake
fluid warning light
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[When you set the ignition switch or
the Engine Start/Stop button to the
ON position.
- The parking brake & brake fluid
warning light illuminates for about 3
seconds and will then turn off once
the parking brake is released.

[When the parking brake is applied.

[When the brake fluid level in the
reservoir is low.
- If the warning light illuminates with
the parking brake released, it indicates
the brake fluid level in the reservoir is
low.
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1. Drive carefully to the nearest safe
location and stop your vehicle.
2. With the engine stopped, check the
brake fluid level immediately and add
fluid as required (For more details,
refer to “Brake Fluid” in chapter 9).
After adding brake fluid, check all
brake components for fluid leaks. If
a brake fluid leak is found, or if the
warning light remains on, or if the
brakes do not operate properly, do not
drive the vehicle. We recommend that
you have the vehicle inspected by a
HYUNDAI authorised repairer.
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Your vehicle is equipped with dual-
diagonal braking systems. This means
you still have braking on two wheels
even if one of the dual systems should
fail.
With only one of the dual systems
working, more than normal pedal travel
and greater pedal pressure are required
to stop the vehicle.
Also, the vehicle will not stop in as short
a distance with only a portion of the
brake system working.
If the brakes fail whilst you are driving,
shift to a lower gear for additional
engine braking and stop the vehicle as
soon as it is safe to do so.
WARNING
Parking Brake & Brake Fluid warning
light
Driving the vehicle with a warning light
ON is dangerous. If the Parking Brake
& Brake Fluid warning light illuminates
with the parking brake released, it
indicates that the brake fluid level is
low.
If this occurs, we recommend that
you have the vehicle inspected by a
HYUNDAI authorised repairer.

4-14
Instrument cluster
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1. Drive carefully to the nearest safe
location and stop your vehicle.
2. Turn the engine off and check the
alternator drive belt for looseness or
breakage.
If the belt is adjusted properly, there
may be a problem in the electrical
charging system.
If this occurs, we recommend that
you have the vehicle inspected by a
HYUNDAI authorised repairer as soon
as possible.
Engine oil pressure
warning light
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When the engine oil pressure is low.
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1. Drive carefully to the nearest safe
location and stop your vehicle.
2. Turn the engine off and check the
engine oil level (For more details,
refer to “Engine Oil” in chapter 9). If
the level is low, add oil as required.
If the warning light remains on after
adding oil or if oil is not available, we
recommend that you have the vehicle
inspected by a HYUNDAI authorised
repairer as soon as possible.
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NOTICE

[If the engine is not stopped
immediately after the Engine Oil
Pressure Warning Light is illuminated,
severe damage could result.

[If the warning light stays on whilst
the engine is running, it indicates
that there may be serious engine
damage or malfunction. In this case:
1. Stop the vehicle as soon as it is safe
to do so.
2. Turn off the engine and check the
oil level. If the oil level is low, fill
the engine oil to the proper level.
3. Start the engine again. If the
warning light stays on after the
engine is started, turn the engine
off immediately. In this case, we
recommend that you have the
vehicle inspected by a HYUNDAI
authorised repairer.

4-16
Instrument cluster
Exhaust System (GPF)
Warning Light
(Petrol Engine,
if equipped)
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[This warning light illuminates, when
accumulated soot reaches a certain
amount.

[When this warning light illuminates, it
may turn off after driving the vehicle
at more than 50 mph (80 km/h) for
about 30 minutes (above 3rd gear with
1500 ~ 4000 engine RPM).
If this warning light blinks in spite
of the procedure (at this time LCD
warning message will be displayed),
we recommend that you have the
GPF system checked by a HYUNDAI
authorised repairer.
NOTICE
If you continue to drive with the GPF
warning light blinking for a long time,
the GPF system can be damaged and
fuel consumption can worsen.
Electronic Stability
Control (ESC) indicator
light
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[When you set the ignition switch or
the Engine Start/Stop button to the
ON position.
- The Electronic Stability Control
indicator light illuminates for about 3
seconds and then goes off.

[Whenever there is a malfunction with
ESC system.
If this occurs, we recommend that
you have the vehicle inspected by a
HYUNDAI authorised repairer.
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[Whilst the ESC is operating.
For more details, refer to “Electronic
Stability Control (ESC)” section in
chapter 6.
Electronic Stability
Control (ESC) OFF
Indicator Light
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[When you set the ignition switch or
the Engine Start/Stop button to the
ON position.
- The ESC OFF indicator light illuminates
for approximately 3 seconds and then
goes off.

[When you deactivate the ESC system
by pressing the ESC OFF button.
For more details, refer to “Electronic
Stability Control (ESC)” section in
chapter 6.

4-22
Instrument cluster
Shift to N to start engine
(for smart key system and
Automatic transmission/Dual clutch
transmission)
This warning message is displayed if
you try to start the engine with the shift
button not in the N (Neutral) position.
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Check BRAKE SWITCH fuse (for
smart key system and Automatic
transmission/Dual clutch
transmission)
This warning message is displayed if the
brake switch fuse is disconnected.
You need to replace the fuse with a new
one. If that is not possible, you can start
the engine by pressing the Engine Start/
Stop button for 10 seconds in the ACC
position.
Door, Bonnet, Tailgate open
indicator
OBC3040012
This warning is displayed if any door
or bonnet or tailgate is left open. The
warning will indicate which door is open
in the display.
CAUTION
Before driving the vehicle, you should
confirm that the door/bonnet/tailgate
is fully closed. Also, check there is no
door/bonnet/tailgate open warning
light or message displayed on the
instrument cluster.

4-24
Instrument cluster
Low engine oil (if equipped)
This warning message is displayed when
the engine oil level should be checked.
If this warning message is displayed,
check the engine oil level as soon as
possible and add engine oil as required.
Slowly pour the recommended oil little
by little into a funnel.
Use only the specified engine oil. (Refer
to "Recommended lubricants and
capacities" section in chapter 2.)
Do not overfill the engine oil. Make sure
the oil level is not above F (Full) mark on
the dipstick.
NOTICE
If the message is displayed
continuously after adding the engine
oil and travelling approximately 31~
62 mile (50~100 km) after the engine
warms up, we recommend that the
system be checked by a HYUNDAI
authorised repairer.
Engine has overheated
(if equipped)
This warning message is displayed
when the engine coolant temperature
is above 120°C (248°F). This means that
the engine is overheated and may be
damaged.
If your vehicle is overheated, refer to
“Overheating” section in chapter 8.
Check headlight (if equipped)
This warning message is displayed if the
headlamps are not operating properly.
In addition, if a specific lamp(turn signal
lamp etc.) is not operating properly, the
warning message according to a specific
lamp (turn signal lamp etc.) is displayed.
A corresponding bulb may need to be
replaced.
Make sure to replace the burned out
bulb with a new one of the same
wattage rating.
Check brake light (if equipped)
This warning message is displayed if the
stop lamps are not operating properly. A
lamp may need to be replaced.
Make sure to replace the burned out
bulb with a new one of the same
wattage rating.
Check Active Air Flap system (if
equipped)
This message is displayed in the
following situations:
- There is a malfunction with the
actuator flap
- There is a malfunction with the
actuator air flap controller
- The air flap does not open
When all of the above conditions are
fixed, the warning will disappear.

5-4
Convenient features
ACCESSING YOUR VEHICLE
Remote key (if equipped)
OIB034040
Your HYUNDAI uses a remote key, which
you can use to lock or unlock a door
(and tailgate) and even start the engine.
(1) Door Lock
(2) Door Unlock
(3) Tailgate Unlock
Locking
To lock :
1. Close all doors, engine bonnet and
tailgate.
2. Press the Door Lock button (1) on the
remote key.
3. The doors will lock. The hazard
warning lights will blink once. Also,
the outside rearview mirror will fold,
if the User Settings mode on the LCD
display. For more details, refer to “LCD
Display” in chapter 4.
4. Make sure the doors are locked by
checking the position of the door lock
button inside the vehicle.
WARNING
Do not leave the keys in your
vehicle with unsupervised children.
Unattended children could place the
key in the ignition switch and may
operate power windows or other
controls, or even make the vehicle
move, which could result in serious
injury or death.
Unlocking
To unlock:
1. Press the Door Unlock button (2) on
the remote key.
2. The doors will unlock. The hazard
warning lights will blink two times.
Also, the outside rearview mirror will
unfold, if the User Settings mode on
the LCD display. For more details,
refer to “LCD Display” in chapter 4.
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After unlocking the doors, the doors will
lock automatically after 30 seconds unless
a door is opened.
Tailgate unlocking
To unlock:
1. Press the Tailgate Unlock button (3)
on the remote key for more than one
second.
2. The hazard warning lights will blink
two times. Once the tailgate is opened
and then closed, the tailgate will lock
automatically.
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