2021 HYUNDAI SONATA HYBRID engine

While Driving
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LFA Operation
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With the Engine Start/Stop button
is in the ON or START position, Lane
Following Assist can be activated by
pressing the button.
Operating conditions
When the system is activated, the
indicator () on the cluster will
illuminate. The color of the indicator will
change depending on the condition of
LFA system.
- Green: Steering assist mode is ON
-White: Steering assist mode is OFF
LFA system operation
• If the vehicle is inside the lane with
both lanes detected by the system
(lane color changes from gray to
white), and there is no abrupt steering
made by the driver, LFA system
changes to steering assist mode.
The
indicator light will come on green, and the system helps the
vehicle stay in line by controlling the
steering wheel.
When the steering wheel is not
controlled temporarily, the
indicator light will flash green and
change to white.
Warning Message
ODN8069068L
Keep hands on steering wheel
If the driver takes their hands off the
steering wheel for several seconds while
LFA system is activated, the system will
warn the driver.
Information
Hold the steering wheel tight. Otherwise,
LFA system could misjudge that the
driver’s hands are off the steering wheel,
and the above warning may occur.
WARNING
The warning message may appear
late according to road conditions.
Therefore, always have your hands on
the steering wheel while driving.

While Driving
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LFA system will not be in the ENABLED
state and/or the steering wheel will not be
assisted when:
• The turn signal is turned on before
changing a lane. If you change
lanes without the turn signal on, the
steering wheel might be controlled.
• The vehicle is not driven in the middle
of the lane when the system is turned
on or right after changing a lane.
• ESC (Electronic Stability Control) or
VSM (Vehicle Stability Management)
is activated.
• The vehicle is driven on a sharp curve.
• If vehicle speed is over 95 mph (153
km/h)
• The vehicle makes sharp lane
changes.
• The vehicle brakes suddenly.
• Only one lane marker is detected.
• The lane is very wide or narrow.
• There are more than two lane markers
on the road (e.g. construction area).
• Radius of a curve is too small.
• The vehicle is driven on a steep
incline.
• The steering wheel is turned suddenly.
• The system may not operate for 15
seconds after the engine is started or
the camera is initialized.Limitations of the System
LFA system may operate prematurely
even if the vehicle does not depart from
the intended lane, OR, LFA system may
not assist your steering or warn you if the
vehicle leaves the intended lane under
the following circumstances:
When the lane and road conditions are
poor
• It is difficult to distinguish the lane
marking from the road surface or the
lane marking is faded or not clearly
marked.
• It is difficult to distinguish the color of
the lane marker from the road.
• There are markings on the road
surface that look like a lane marker
that is inadvertently being detected
by the camera.
• The lane marker is indistinct or
damaged.
• The lane marker is merged or divided
(e.g. tollgate).
• The lane number increases or
decreases or the lane marker are
crossing complicatedly.
• There are more than two lane markers
on the road in front of you.
• The lane marker is very thick or thin.
• The lane is very wide or narrow.
• The lane marker ahead is not visible
due to rain, snow, water on the road,
damaged or stained road surface, or
other factors.

06
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System Setting and Operation
System setting
• With the Engine Start/Stop button in
the ON or START position, Highway
Driving Assist can be activated
by selecting 'Driver Assistance
→
Highway Driving Assist’ from the User
Settings mode on the infotainment
system. For detailed information,
please refer to the infotainment
system manual separately supplied.
• If the engine is turned off then on
again, the system maintains the last
setting.
Operating conditions
Select 'Highway Driving Assist' from
the Settings menu in the infotainment
system screen and satisfy the following
conditions for the system to operate.
• Driving on the highway main line
• Smart Cruise Control is operating
-If Smart Cruise Control is in the
READY state the Highway Driving
Assist will be in the READY state.
The
indicator on the cluster will illuminate white.
• Vehicle speed is under 95 mph (153
km/h)
If all the mentioned conditions are
satisfied, the system is ENABLED and
the
indicator on the cluster will illuminate green.
Steering wheel control
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Steering control
If the vehicle detects both lane markers
(lane color white), the
indicator light will change from white to green. This
indicates that the steering wheel is being
controlled.
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Temporary deactivation
The
indicator light changes from green to white when the steering wheel
control is temporarily deactivated. Even
if the steering wheel is not controlled,
the distance between the vehicle ahead
will be maintained.

06
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WARNING
• Always be aware of road conditions
while driving and be alert for
unexpected situations even though
Rear Cross-Traffic Collision Warning
system and Rear Cross-Traffic
Collision-Avoidance Assist system
are operating.
• Rear Cross-Traffic Collision Warning
system and Rear Cross-Traffic
Collision-Avoidance Assist system
are supplemental systems to assist
you. Do not entirely rely on the
systems. Always pay attention, while
driving, for your safety.
• Rear Cross-Traffic Collision Warning
system and Rear Cross-Traffic
Collision-Avoidance Assist system
are not substitutes for proper and
safe driving. Always drive safely and
use caution when backing up the
vehicle.
System Setting and Activation
System setting
• The driver can activate the systems
by placing the ignition switch to the
ON position and by selecting “User
Settings → Driver Assistance → Parking Safety → Rear Cross-Traffic Safety”. RCCW and RCCA turn on and get
ready to be activated when ‘Rear
Cross-Traffic safety’ is selected.
• When the engine is turned off then on
again, the systems are always ready to
be activated.
• When the system is initially turned
on and when the engine is turned off
then on again, the warning light will
illuminate for 3 seconds on the side
view mirror.
The driver can select the initial warning
activation time in the User Settings in
the LCD display or infotainment system
display by selecting ‘User Settings → Driver Assistance → Warning Timing’.

While Driving
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Hazardous Driving Conditions
When hazardous driving elements
are encountered such as water, snow,
ice, mud and sand, take the below
suggestions:
• Drive cautiously and keep a longer
braking distance.
• Avoid abrupt braking or steering.
• When your vehicle is stuck in
snow, mud, or sand, use second
gear. Accelerate slowly to avoid
unnecessary wheel spin.
• Put sand, rock salt, tire chains or other
non-slip materials under the wheels to
provide additional traction while the
vehicle becomes stuck in ice, snow,
or mud.
WARNING
Downshifting with an automatic
transmission while driving on slippery
surfaces can cause an accident. The
sudden change in tire speed could
cause the tires to skid. Be careful when
downshifting on slippery surfaces.
Rocking the Vehicle
If it is necessary to rock the vehicle to
free it from snow, sand, or mud, first turn
the steering wheel right and left to clear
the area around your front wheels. Then,
shift back and forth between R (Reverse)
and a forward gear.
Try to avoid spinning the wheels, and do
not race the engine.
To prevent transmission wear, wait until
the wheels stop spinning before shifting
gears. Release the accelerator pedal
while shifting, and press lightly on the
accelerator pedal while the transmission
is in gear. Slowly spinning the wheels in
forward and reverse directions causes a
rocking motion that may free the vehicle.
WARNING
If the vehicle is stuck and excessive
wheel spin occurs, the temperature
of the tires can increase very quickly.
If the tires become damaged, a tire
blow out or tire explosion can occur.
This condition is dangerous - you and
others may be injured. Do not attempt
this procedure if people or objects are
anywhere near the vehicle.
If you attempt to free the vehicle, the
vehicle can overheat quickly, possibly
causing an engine compartment fire
or other damage. Try to avoid spinning
the wheels as much as possible to
prevent overheating of either the tires
or the engine. DO NOT allow the vehicle
to spin the wheels above 35 mph (56
km/h).
Information
The ESC system must be turned OFF
before rocking the vehicle.
NOTICE
If you are still stuck after rocking the
vehicle a few times, have the vehicle
pulled out by a tow vehicle to avoid
engine overheating, possible damage to
the transmission, and tire damage. See
"Towing" in chapter 7.
SPECIAL DRIVING CONDITIONS

While Driving
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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 several
times while the vehicle is moving slowly.
Highway Driving
Tires
Adjust the tire inflation, as specified.
Under-inflation may overheat or damage
the tires.
Do not install worn-out or damaged tires,
which may reduce traction or adversely
affect vehicle handling. This could lead
to sudden tire failure that may cause
loss of vehicle control resulting in an
accident.
Information
Never over-inflate your tires above the
maximum inflation pressure, as specified
on your tires.
Fuel, engine coolant and engine oil
Driving at higher speeds on the highway
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.

06
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The severe weather conditions of winter
quickly wear out tires and cause other
problems. To minimize winter driving
problems, you should take the following
suggestions:
Snow or Icy Conditions
You need to keep sufficient distance
between your vehicle and the vehicle in
front of you.
Apply the brakes gently. Speeding, rapid
acceleration, sudden brake applications,
and sharp turns are potentially
very hazardous practices. During
deceleration, use engine braking to the
fullest extent. Sudden brake applications
on snowy or icy roads may cause the
vehicle to skid.
To drive your vehicle in deep snow, it
may be necessary to use snow tires or to
install tire chains on your tires.
Always carry emergency equipment.
Some of the items you may want to carry
include tire chains, tow straps or chains,
a flashlight, emergency flares, sand, a
shovel, jumper cables, a window scraper,
gloves, ground cloth, coveralls, a blanket,
etc.
Snow tires
WARNING
Snow tires should be equivalent in size
and type to the vehicle’s standard tires.
Otherwise, the safety and handling of
your vehicle may be adversely affected.
If you mount snow tires on your vehicle,
make sure to use radial tires of the same
size and load range as the original tires.
Mount snow tires on all four wheels
to balance your vehicle’s handling in
all weather conditions. The traction
provided by snow tires on dry roads
may not be as high as your vehicle's
original equipment tires. Check with
the tire dealer for maximum speed
recommendations.
Information
Do not install studded tires without
first checking local, state and municipal
regulations for possible restrictions against
their use.
WINTER DRIVING

06
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Chain installation
When installing tire chains, follow the
manufacturer’s instructions and mount
them as tightly possible. Drive slowly
(less than 20 mph (30 km/h)) with
chains installed. If you hear the chains
contacting the body or chassis, stop and
tighten them. If they still make contact,
slow down until the noise stops. Remove
the tire chains as soon as you begin
driving on cleared roads.
When mounting snow chains, park the
vehicle on level ground away from traffic.
Turn on the vehicle Hazard Warning
Flasher and place a triangular emergency
warning device behind the vehicle (if
available). Always place the vehicle in P
(Park), apply the parking brake and turn
off the engine before installing snow
chains.
NOTICE
When using tire chains:
• Wrong size chains or improperly
installed chains can damage your
vehicle's brake lines, suspension,
body and wheels.
• Use SAE "S" class or wire chains.
• If you hear noise caused by chains
contacting the body, retighten the
chain to prevent contact with the
vehicle body.
• To prevent body damage, retighten
the chains after driving 0.3~0.6 miles
(0.5~1.0 km).
• Do not use tire chains on vehicles
equipped with aluminum wheels. If
unavoidable, use a wire type chain.
• Use wire chains less than 0.59 inch
(15mm) wide to prevent damage to
the chain’s connection.
Winter Precautions
Use high quality ethylene glycol
coolant
Your vehicle is delivered with high
quality ethylene glycol coolant in the
cooling system. It is the only type of
coolant that should be used because it
helps prevent corrosion in the cooling
system, lubricates the water pump and
prevents freezing. Be sure to replace or
replenish your coolant in accordance
with the maintenance schedule in
chapter 8. Before winter, have your
coolant tested to assure that its freezing
point is sufficient for the temperatures
anticipated during the winter.
Change to "winter weight" oil if
necessary
In some climates it is recommended that
a lower viscosity "winter weight" oil be
used during cold weather. See chapter 8
for recommendations. If you aren't sure
what weight oil you should use, consult
an authorized HYUNDAI dealer.
Check battery and cables
Winter puts additional burdens on the
battery system. Visually inspect the
battery and cables as described in
chapter 8. The level of charge in your
battery can be checked by an authorized
HYUNDAI dealer or a service station.