2020 Hyundai Ioniq Hybrid fuel pressure

3-40
Convenient features of your vehicle
Fuel filler door
(Hybrid vehicle)
Opening the fuel filler door
1. Turn the vehicle off.
2. Push the fuel filler door opener
button.3. Pull the fuel filler door (1) out to
fully open.
4. To remove the fuel tank cap (2),
turn it anticlockwise. You may hear
a hissing noise as the pressure
inside the tank equalizes.
5. Place the cap on the fuel filler door.
Information
If the fuel filler door does not open
because ice has formed around it, tap
lightly or push on the door to break
the ice and release the door. Do not
pry on the door. If necessary, spray
around the door with an approved de-
icer fluid (do not use radiator anti-
freeze) or move the vehicle to a warm
place and allow the ice to melt.
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OAE046025
OAEPH049632R

3-43
Convenient features of your vehicle
3. Wait until the fuel tank is depres-
surized.
The message "Fuel door open" is
displayed when the fuel filler door
opens after the fuel tank is
depressurised.
Information
• It may take up to 20 seconds to open
the fuel filler door.
• When the fuel filler door is frozen
and does not open after 20 seconds
at freezing temperature, slightly tap
the fuel filler door and then attempt
to open it.4. Pull the fuel filler door (1) out to
fully open.
5. To remove the fuel tank cap (2),
turn it anticlockwise. You may hear
a hissing noise as the pressure
inside the tank equalizes.
6. Place the cap on the fuel filler door.
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3
OAEPH047025L
Add fuel into the fuel tank
within 20 minutes after open-
ing the fuel filler door. After 20
minutes, the fuel tank may
shut off, causing fuel to over-
flow. In this case, re-press the
fuel filler door opening but-
ton.
Do not leave the fuel filler
door opened for an extended
period of time. It may dis-
charge the battery.
Close the fuel filler door after
fuelling the vehicle. If you
start the vehicle with the fuel
filler door opened, the mes-
sage, "Check fuel door", illu-
minates on the LCD display.
Avoid refuelling the vehicle
whilst charging the (high-volt-
age) hybrid battery. It may
cause a fire or an explosion
due to static electricity.
WARNING
OAEPHQ049830L/OAEPHQ049832L

3-62
Convenient features of your vehicle
If the engine does not stop
immediately after the Engine Oil
Pressure Warning Light is illumi-
nated, severe damage could
result.
If the warning light stays on
whilst the engine is running, it
indicates that there may be seri-
ous engine damage or malfunc-
tion. 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
an authorised HYUNDAI deal-
er.
Low Fuel Level
Warning Light
This warning light illuminates:
When the fuel tank is nearly empty.
Add fuel as soon as possible.
Driving with the Low Fuel Level
warning light on or with the fuel
level below "0 or E" can cause the
engine to misfire and damage the
catalytic converter (if equipped).
Engine Coolant
Temperature Warning
Light
This warning light illuminates:
When the engine coolant tempera-
ture is above 120°C (248°F). This
means that the engine is overheat-
ed and may be damaged.
If your vehicle is overheated, refer
to “Overheating” in chapter 6.
Overspeed Warning
Light (if equipped)
This warning light blinks:
When you drive the vehicle more
than 120 km/h.
- This is to prevent you from driving
your vehicle with overspeed.
- The overspeed warning chime
also sounds for approximately 5
seconds.
NOTICE
NOTICE
120km/h

3-83
Convenient features of your vehicle
3
LCD display modes
The information provided may differ depending on which functions are applicable to your vehicle.
Range
(Plug-in hybrid vehicle)
Route GuidanceSmart Cruise Control
(SCC) Driver Assistance
The Master Warning
mode displays warn-
ing messages related
to the vehicle when
one or more systems
is not operating nor-
mally.
Fuel Economy
Accumulated InfoDestination InfoLane Keeping Assist
(LKA)Door
Drive InfoLane Following Assist
(LFA) Lights
Driving styleDriver Attention
Warning (DAW)Sound
Energy flowConvenience
Engine coolant
temperature
Speed Limit Warning
(ISLW)Service Interval
Tyre PressureOther Features
Language
Reset
Menu
Trip Computer TBT Driving Assist User Settings Master warning
Up/Down

3-93
Convenient features of your vehicle
3
ItemsExplanation
AUX. BATTERY SAVER+
To activate or deactivate the Aux. Battery Saver+ function.
When activated, the high voltage battery is used to keep the 12V battery charged.
For more details, reter to the ''Hybrid System Overview'' provided in the front of the
owner’s manual.
Fuel Economy Auto Reset
The average fuel economy will not reset automatically whenever refueling.
When the engine has been OFF for 4 hours or longer the average fuel economy
will reset automatically.
The average fuel economy will reset automatically after adding 6 liters of fuel
or more and after driving speed exceeds 1 km/h.
For more details, refer to "Trip Computer" in this chapter.
Fuel Economy UnitTo select the fuel economy unit.
(km/L, L/100km, MPG)
Temperature UnitTo select the temperature unit.
(°C,°F)
Tyre Pressure UnitTo select the tyre pressure unit.
(psi, kPa, bar)
7. Other (features)
❈ ❈

The information provided may differ depending on which functions are applicable to your vehicle.

5-152
Driving your vehicle
If you believe your brakes may be
wet, apply them lightly whilst driv-
ing until normal braking operation
returns.
Hydroplaning
If the road is wet enough and you are
going fast enough, your vehicle may
have little or no contact with the road
surface and actually ride on the
water. The best advice is SLOW
DOWN when the road is wet.
The risk of hydroplaning increas-
es as the depth of tyre tread
decreases, refer to "Tyre Tread" in
chapter 7.
Driving in flooded areas
Avoid driving through flooded areas
unless you are sure the water is no
higher than the bottom of the wheel
hub. Drive through any water slowly.
Allow adequate stopping distance
because brake performance may be
reduced.
After driving through water, dry the
brakes by gently applying them sev-
eral times whilst the vehicle is mov-
ing slowly.
Highway driving
Tyres
Adjust the tyre inflation, as specified.
Under-inflation may overheat or
damage the tyres.
Do not install worn-out or damaged
tyres, which may reduce traction or
fail the braking operation.
Information
Never over-inflate your tyres above
the maximum inflation pressure, as
specified on your tyres.
Fuel, engine coolant and engine
oil
Driving at higher speeds on the high-
way consumes more fuel and is less
efficient than driving at a slower,
more moderate speed. Maintain a
moderate speed in order to conserve
fuel when driving on the highway.
Be sure to check both the engine
coolant level and the engine oil
before driving.
Drive belt
A loose or damaged drive belt may
overheat the engine.
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6-15
What to do in an emergency
Tyre pressure monitoring sys-
tem
Each tyre, including the spare (if pro-
vided), should be checked monthly
when cold and inflated to the inflation
pressure recommended by the vehi-
cle manufacturer on the vehicle plac-
ard 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 pres-
sure 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 sig-
nificantly under-inflated tyre causes
the tyre to overheat and can lead to
tyre failure.
Under-inflation also reduces fuel effi-
ciency 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 mainte-
nance, and it is the driver’s responsi-
bility to maintain correct tyre pres-
sure, even if under-inflation has not
reached the level to trigger illumina-
tion 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 mal-
function indicator is combined with
the low tyre pressure telltale. When
the system detects a malfunction,
the telltale will flash for approximate-
ly one minute and then remain con-
tinuously illuminated. This sequence
will continue upon subsequent vehi-
cle start-ups as long as the malfunc-
tion exists.
When the malfunction indicator is illu-
minated, the system may not be able
to detect or signal low tyre pressure
as intended. TPMS malfunctions may
occur for a variety of reasons, includ-
ing the installation of replacement or
alternate tyres or wheels on the vehi-
cle that prevent the TPMS from func-
tioning properly.
Always check the TPMS malfunction
telltale after replacing one or more
tyres or wheels on your vehicle to
ensure that the replacement or alter-
nate tyres and wheels allow the
TPMS to continue to function proper-
ly.
6
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 con-
trol resulting in an accident.
WARNING

7-7
7
Maintenance
Owner maintenance schedule
When you stop for fuel:
Check the engine oil level.
Check the coolant level in the
engine coolant reservoir.
Check the windscreen washer fluid
level.
Check for low or under-inflated
tyres.
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 loose-
ness in the steering wheel, or
change in its straight-ahead posi-
tion.
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 dual clutch transmission
P (Park) function.
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 condi-
tioning hoses for leaks or damage.
Check windscreen washer spray
and wiper operation. Clean wiper
blades with a clean cloth damp-
ened with washer fluid.
Check headlamp alignment.
Check muffler, exhaust pipes,
shields and clamps.
Check the seat belts for wear and
function. Be careful when checking your
engine coolant/inverter 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.
WARNING