2021 HYUNDAI I20 engine overheat

9-8
Emergency situations
6. If you cannot find the cause of the
overheating, wait until the engine
temperature has returned to normal.
Then, if coolant has been lost,
carefully add coolant to the reservoir
to bring the fluid level in the reservoir
up to the halfway mark.
7. Proceed with caution, keeping alert
for further signs of overheating.
If overheating happens again,
we recommend that you call an
authorized HYUNDAI dealer for
assistance.
NOTICE
• Serious loss of coolant indicates a
leak in the cooling system and we
recommend the system be checked
by an authorized HYUNDAI dealer.
• When the engine overheats from
low engine coolant, suddenly adding
engine coolant may cause cracks
in the engine. To prevent damage,
add engine coolant slowly in small
quantities.

9-10
Emergency situations
Tire pressure monitoring system
WARNING
Over-inflation or under-inflation can
reduce tire life, adversely affect vehicle
handling, and lead to sudden tire
failure that may cause loss of vehicle
control resulting in an accident.
Each tire, 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 tire inflation pressure label. (If your
vehicle has tires of a different size
than the size indicated on the vehicle
placard or tire inflation pressure label,
you should determine the proper tire
inflation pressure for those tires.)
As an added safety feature, your
vehicle has been equipped with a tire
pressure monitoring system (TPMS)
that illuminates a low tire pressure
telltale when one or more of your tires is
significantly under-inflated.
Accordingly, when the low tire pressure
telltale illuminates, you should stop and
check your tires as soon as possible,
and inflate them to the proper pressure.
Driving on a significantly under-inflated
tire causes the tire to overheat and can
lead to tire failure. Under-inflation also
reduces fuel efficiency and tire tread life,
and may affect the vehicle’s handling
and stopping ability.
Please note that the TPMS is not a
substitute for proper tire maintenance,
and it is the driver’s responsibility to
maintain correct tire pressure, even if
under-inflation has not reached the level
to trigger illumination of the TPMS low
tire 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 tire 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 tire pressure as intended.
TPMS malfunctions may occur for
a variety of reasons, including the
installation of replacement or alternate
tires or wheels on the vehicle that
prevent the TPMS from functioning
properly. Always check the TPMS
malfunction telltale after replacing
one or more tires or wheels on your
vehicle to ensure that the replacement
or alternate tires and wheels allow the
TPMS to continue to function properly.
i Information
If the TPMS indicator does not illuminate
for 3 seconds when the ignition switch
is turned to the ON position or engine
is running, or if it comes on after
blinking for approximately one minute,
we recommend that you contact an
authorized HYUNDAI dealer.

10-32
Maintenance
The high-pressure cooling system
has a reservoir filled with year-round
antifreeze coolant. The reservoir is filled
at the factory.
Check the antifreeze protection and
coolant level at least once a year, at the
beginning of the winter season, and
before traveling to a colder climate.
NOTICE
• Do not drive with no engine coolant.
It may cause water pump failure and
engine seizure, etc.
• When the engine overheats from
low engine coolant, suddenly adding
engine coolant may cause cracks
in the engine. To prevent damage,
add engine coolant slowly in small
quantities.
Checking the coolant level
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„„Petrol Engine (1.0 T-GDi)Petrol Engine (1.0 T-GDi)
Check the condition and connections
of all cooling system hoses and
heater hoses. Replace any swollen or
deteriorated hoses.
The coolant level should be filled
between F (Full) and L (Low) marked on
the side of the coolant reservoir when
the engine is cool.
If the coolant level is low, add enough
distilled (deionized) water.
Bring the level to F (Full), but do
not overfill. If frequent additions are
required, we recommend that the
system be inspected by an authorized
HYUNDAI dealer.
ENGINE COOLANT

10-102
Maintenance
4. Self Regeneration Mode
LCD Type
If the warning message “Self
Regeneration” is stored in inspection
message tap, it is operable in LCD
warning message page.
WARNING
• Make sure the vehicle parked on
safety zone (to avoid the flammables
like grass and traffic accident)
• Check remained fuel above 1/5 of
full level fuel gauge to prevent fuel
overheat
• Open the hood to prevent engine
room overheat
• Self regeneration should be done
only when DPF indicator illuminates
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If the warning message “Diesel filter
regeneration required, See owner’s
manual.” appears on the LCD display,
Self Regeneration is required
To initiate Self Regeneration
1. Engage parking brake and shift lever
at P state.
2. Turn on the engine
3. Warm up the engine and check engine
temperature gauge at the middle
position
4. Turn on the air conditioner and set the
blower to the maximum.
5. Turn on the high beam.
6. Operate the rear defog function.
7. Hold the OK button on the LCD
warning message page.
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8. Turn off and turn on the engine again.

10-103
10
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Not Operating Condition
Under below condition, Diesel
Catalyst regeneration process may be
interrupted. (Engine RPM drops to idle
state)
- Engine overheat or insufficient
warm-up
- Shift lever change to D or R state
- Acceleration pedal is pressed
- Movement of Vehicle (Vehicle speed
over 0)
Service Check
If the DPF indicator change from
illuminates to blink or Engine Check
Lamp(MIL) illuminates with DPF
indicator in spite of the procedure,
please visit an authorized Hyundai dealer
and then check the Diesel Catalyst
and engine system including oil level
inspection.
Please note that the vehicle acceleration
is limited to protect engine system when
DPF indicator blinks or Engine Check
Lamp(MIL) illuminates.
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Operationg Self Regeneration Mode
If the self regeneration mode starts, the
message “Filter regenerationg…” and the
remaining time appears.
It takes around 30~60 minutes.
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Self Regeneration Mode Fail
The regeneration operation could be
canceled if the driver press the OK
button firmly while operating the self
regeneration process.

10-104
Maintenance
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If the system still needs the self
regeneration process after cancelling
the operation, the warning message
appears. (Diesel filter regeneration
required.)
If the driver press the OK button firmly,
it can restart the self regeneration mode
again. (The Self regeneration conditions
should be satisfied.)
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The self regeneration process stops if
any of the self regeneration conditions
is cancelled. If the self regeneration
process is cancelled automatically, the
system maintains “Self-regeneration
stopped” message.
If the driver press the OK button firmly,
it can restart the self regeneration mode
again. (Self regeneration conditions
should be satisfied.)
Segment Type
Regeneration
The self regeneration procedure is
conducted as follows.
1) Repeat key position at LOCK (or
ACC)  ON state 5 times (within 30
seconds)
2) Start engine
3) Monitor engine state
: Within 20 seconds, engine RPM rise
to about 2000 & DPF indicator blinks
and it continues for 30~60 minutes.
After the end of regeneration, engine
RPM drop to idle & DPF indicator
turn out automatically.
4) Stop the engine (Key Off), wait for 20
seconds and restart the engine
5) Check malfunction indicator turn out
CAUTION
Under below condition, Diesel
Catalyst regeneration process may be
interrupted. (Engine RPM drops to idle
state)
• Engine overheat or insufficient
warm-up
• Shift lever change to D or R state
• Acceleration pedal is pressed
• Movement of Vehicle (Vehicle speed
over 0)