2021 HYUNDAI I20 check engine

10-101
10
Diesel particulate filter (DPF)
(if equipped)
The Diesel Particulate Filter (DPF)
system removes the soot in the exhaust
gas. Unlike a disposable air filter,
the DPF system automatically burns
(oxidizes) and removes the accumulated
soot according to the driving condition.
In order words, the active burning by
engine control system and high exhaust
gas temperature caused by normal/high
diving condition burns and removes the
accumulated soot.
However, if the vehicle continues to
be driven at repeated short distance
or driven at low speed for a long time,
the accumulated soot may not be
automatically removed because of low
exhaust gas temperature. More than
a certain amount of soot deposited,
the malfunction indicator light (
)
illuminates.
When the malfunction indicator light
illuminates, it may turn-off after driving
the vehicle at more than 60km/h (37
mph) or at more than second gear with
1500~2500 engine rpm for a certain time
(for about 25 minutes).
If the malfunction indicator light (
) is not turn-off or blinking continuesly
in spite of the procedure, visit a
professional workshop and check the
DPF system. HYUNDAI recommends
to visit an authorized HYUNDAI dealer/
service partner.
If you continue to drive with the
malfunction indicator light blinking for
a long time, the DPF system can be
damaged and fuel consumption can be
worsen and the engine durability can be
worsen by oil dilution.
CAUTION
Diesel Fuel (if equipped with DPF)
We recommend you to use only the
regulated diesel fuels, when your
vehicle is equipped with the DPF
system.
When you use other diesel fuels, which
is high in sulfurs (above 50 ppm) or
contains unspecified additives, it may
damage the DPF system and cause the
white smoke emission.
Lean NOx Trap (if equipped)
The Lean NOx Trap (LNT) system
removes the nitrogen oxide in the
exhaust gas. The smell can occur in the
exhaust gas depending on the quality
of the fuel and it can degrade NOx
reduction performance, please use the
regulated automotive diesel fuel.

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)

10-105
10
WARNING
If vehicle doesn’t enter regeneration
mode or if regeneration mode is
interrupted, stop the engine (Key Off),
wait for 20 seconds and retry the self
regeneration procedure.
WARNING
Self regeneration should be done
only when DPF indicator illuminates.
Frequent regeneration may cause
engine oil dilution and shortening of
Diesel Catalyst durability.
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.