2021 HYUNDAI SONATA HYBRID engine

Convenient Features
5-44
WARNING
Before programming HomeLink® to a
garage door opener or gate operator,
make sure people and objects are out
of the way of the device to prevent
potential harm or damage. Do not
use the HomeLink® with any garage
door opener that lacks the safety
stop and reverse features required
by U.S. federal safety standards (this
includes any garage door opener model
manufactured before April 1, 1982).
A garage door that cannot detect an
object - signaling the door to stop and
reverse - does not meet current U.S.
federal safety standards. Using a garage
door opener without these features
increases the risk of serious injury or
death.
Programming HomeLink
®
Please note the following:
• When programming a garage door
opener, it is advised to park the
vehicle outside of the garage.
• It is recommended that a new battery
be placed in the hand-held transmitter
of the device being programmed to
HomeLink® for quicker training and
accurate transmission of the radio-
frequency signal.
• Some vehicles may require the
Engine Start/Stop button to be in the
ACC (or “Accessories”) position for
programming and/or operation of
HomeLink®.
• In the event that there are still
programming difficulties or questions
after following the programming steps
listed below, contact HomeLink® at:
www.homelink.com, www.youtube.
com/HomeLinkGentex or by calling
1-800-355-3515. Programming
To program most devices, follow these
instructions:
ODN8H050136N
1. Press and release (1), (2) or (3) button.
• If the indicator (7) is turned ON in
Orange, go to Step 3) since it is a
new programming.
• If the indicator (7) is continuously
turned ON or flashes in Green
rapidly several times, go to Step 2)
since it is a programmed button.
2. Press and hold the button you wish
to program for approximately 15-
25 seconds until the LED flashes in
Orange for several times.
3. Hold the Garage Door Opener Original
Transmitter near the HomeLink Mirror.

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5-55
PANORAMIC SUNROOF (IF EQUIPPED)
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If your vehicle is equipped with a
sunroof, you can slide or tilt your sunroof
with the sunroof control switch located
on the overhead console.
The sunroof can only be opened, closed,
or tilted when the ignition switch is in the
ON position.
The sunroof is operable for 30 seconds,
after the ignition switch is placed in the
OFF or ACC position. However, if the
front doors are opened, the sunroof
cannot be opera ted even within 30
seconds.
Information
• In cold and wet climates, the sunroof
may not work properly due to freezing
conditions.
• After the vehicle is washed or in a
rainstorm, be sure to wipe off any
water that is on the sunroof before
operating it.
WARNING
• Never adjust the sunroof or sunshade
while driving. This could result in
loss of control and an accident that
may cause death, serious injury, or
property damage.
• Make sure heads, hands, arms or
any other body parts or objects are
out of the way before operating the
sunroof.
• Do not extend your head, arms or
body outside the sunroof while
driving, to avoid serious injury.
• Do not leave the engine running
and the key in your vehicle with
unsupervised children. Unattended
children could operate the sunroof,
which could result in serious injury.
• Do not sit on the top of the vehicle. It
may cause injury or vehicle damage.
NOTICE
• Do not continue to move the sunroof
control lever after the sunroof is fully
opened, closed, or tilted. Damage
to the motor or system components
could occur.
• Make sure the sunroof is closed fully
when leaving your vehicle.
If the sunroof is left open, rain or
snow may wet the interior of the
vehicle. Also, leaving the sunroof
open when the vehicle is unattended
may invite theft.

Convenient Features
5-58
Resetting the Sunroof
ODN8A059039
The sunroof may need to be reset if the
following conditions occur:
• The battery is discharged or
disconnected or the sunroof fuse has
been replaced or disconnected
• The sunroof control lever is not
operating correctly
To reset the sunroof, perform the
following steps:
1. Turn the engine on and close
the sunroof glass and sunshade
completely.
2. Release the control lever.
3. Push and hold the sunroof control
lever (1) forward (to close the
sunshade) for about 10 seconds until
the sunroof moves slightly, then
release the control lever.
4. Push and hold the sunroof control
lever forward until the sunroof
operates as follows:
TILT DOWN → SLIDE OPEN → SLIDE CLOSE
Then, release the control lever.
When this is complete, the sunroof
system is reset.
For more information, contact an
authorized HYUNDAI dealer.
Information
If you do not reset the sunroof, it may not
work properly.
Sunroof Open Warning
(if equipped)
• If the driver turns off the engine
when the sunroof is not fully closed,
the warning chime will sound for
approximately 3 seconds and the
sunroof open warning will appear on
the cluster LCD display.
• If the driver turns off the engine and
opens the door when the sunroof is
not fully closed, the sunroof open
warning will appear on the cluster
LCD display until the door is closed or
the sunroof is fully closed.
Close the sunroof securely when leaving
your vehicle.

Convenient Features
5-62
EXTERIOR FEATURES
Hood
Opening the hood
ODN8A059040
1. Park the vehicle and set the parking
brake.
2. Pull the release lever to unlatch the
hood. The hood should pop open
slightly.
ODN8H050041N
3. Go to the front of the vehicle, raise the
hood slightly, push up the secondary
latch (1) inside of the hood center
and lift the hood (2). After it has been
raised about halfway, it will raise
completely by itself.
Closing the hood
1. Before closing the hood, check in and
around the engine compartment to
ensure the following:
-Any tools or other loose objects are
removed from the engine room area
or hood opening area
-All glove, rags, or other combustible
material is removed from the engine
compartment
-All filler caps are tightly and
correctly installed
2. Lower the hood halfway (lifted
approximately 12 inches (30 cm) from
the closed position) and push down
to securely lock in place. Then double
check to be sure the hood is secure.
If the hood can be raised slightly, it is
not securely locked. Open it again and
close it with more force.
WARNING
• Before closing the hood, ensure
all obstructions are removed from
around the hood opening.
• Always double check to be sure that
the hood is firmly latched before
driving away. Check there is no
hood open warning light or message
displayed on the instrument cluster.
Driving with the hood opened may
cause a total loss of visibility, which
might result in an accident.
• Do not move the vehicle with the
hood in the raised position, as vision
is obstructed, which might result in
an accident, and the hood could fall
or be damaged.

Convenient Features
5-68
Fuel Filler Door
Opening the fuel filler door
ODN8059050
1. Turn the engine off.
2. Ensure the driver’s door is unlocked.
3. Push the fuel filler door near the 3
o’clock position.
ODN8059051
4. Pull the fuel filler door (1) outward to
access the fuel tank cap.
5. To remove the fuel tank cap (2), turn
it counterclockwise. You may hear a
hissing noise as the pressure inside
the tank equalizes.
6. 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 deicer fluid (do not use
radiator antifreeze) or move the vehicle to
a warm place and allow the ice to melt.
Closing the fuel filler door
1. To install the fuel tank cap, turn it
clockwise until it “clicks” one time.
2. Close the fuel filler door until it is
latched securely.
WARNING
Gasoline is highly flammable and
explosive. Failure to follow these
guidelines may result in SERIOUS
INJURY or DEATH:
• Read and follow all warnings posted
at the gas station.
• Before refueling, note the location of
the Emergency Gasoline Shut-Off, if
available, at the gas station.
• Before touching the fuel nozzle, you
should eliminate the potential build-
up of static electricity by touching
a metal part of the vehicle, a safe
distance away from the fuel filler
neck, nozzle, or other gas source,
with your bare hand.
• Do not use cellular phones while
refueling. Electric current and/or
electronic interference from cellular
phones can potentially ignite fuel
vapors and cause a fire.

05
5-69
• Do not get back into a vehicle
once you have begun refueling.
You can generate a buildup of
static electricity by touching,
rubbing or sliding against any item
or fabric capable of producing
static electricity. Static electricity
discharge can ignite fuel vapors
causing a fire. If you must re-enter
the vehicle, you should once again
eliminate potentially dangerous
static electricity discharge by
touching a metal part of the vehicle,
away from the fuel filler neck, nozzle
or other gasoline source, with your
bare hand.
• When using an approved portable
fuel container, be sure to place the
container on the ground prior to
refueling. Static electricity discharge
from the container can ignite fuel
vapors causing a fire.
Once refueling has begun, contact
between your bare hand and the
vehicle should be maintained until
the filling is complete.
• Use only approved portable plastic
fuel containers designed to carry and
store gasoline.
• When refueling, always move the
shift button to the P (Park) position,
set the parking brake, and place
the ignition switch to the LOCK/
OFF position. Sparks produced by
electrical components related to the
engine can ignite fuel vapors causing
a fire.
• Do not use matches or a lighter and
do not smoke or leave a lit cigarette
in your vehicle while at a gas station,
especially during refueling.
• Do not over-fill or top-off your
vehicle tank, which can cause
gasoline spillage.• If a fire breaks out during refueling,
leave the vicinity of the vehicle, and
immediately contact the manager
of the gas station and then contact
the local fire department. Follow any
safety instructions they provide.
• If pressurized fuel sprays out, it can
cover your clothes or skin and thus
subject you to the risk of fire and
burns. Always remove the fuel cap
carefully and slowly. If the cap is
venting fuel or if you hear a hissing
sound, wait until the condition stops
before completely removing the cap.
• Always check that the fuel cap is
installed securely to prevent fuel
spillage in the event of an accident.
Information
Make sure to refuel your vehicle according
to the “Fuel Requirements” suggested in
the Introduction chapter.
NOTICE
• Do not spill fuel on the exterior
surfaces of the vehicle. Any type of
fuel spilled on painted surfaces may
damage the paint.
• If the fuel filler cap requires
replacement, use only a genuine
HYUNDAI cap or the equivalent
specified for your vehicle. An
incorrect fuel filler cap can result
in a serious malfunction of the fuel
system or emission control system.

Convenient Features
5 -74
ODN8A059204
To flash the high beam headlamp, pull
the lever towards you, then release the
lever. The high beams will remain ON as
long as you hold the lever towards you.
High Beam Assist (HBA)
ODN8059206
High Beam Assist is a system that
automatically adjusts the headlamp
range (switches between high beam and
low beam) according to the brightness of
other vehicles and road conditions.
System setting
The driver can activate HBA by placing
the ignition switch to the ON position
and by selecting:
‘User Settings → Lights → High Beam Assist’. If you disable this setting, HBA
will not work.
The setting of the HBA will be
maintained, as selected, when the
engine is re-started.Operating condition
1. Place the headlamp switch in the
AUTO position.
2. Turn on the high beam by pushing the
lever away from you.
High Beam Assist (
) indicator will
illuminate.
3. High Beam Assist system will turn on
when vehicle speed is above 25 mph
(40 km/h).
• If the headlamp switch is pushed
away when High Beam Assist
system is operating, High Beam
Assist system will turn off and the
high beam will be on continuously.
• If the headlamp switch is pulled
towards you when the high beam
is OFF, the high beam will turn ON
without High Beam Assist system
canceled. When you let go of the
light switch, the lever will move to
the middle and the high beam will
turn OFF.
• If the headlamp switch is pulled
towards you when the high beam is
on by High Beam Assist system, the
low beam will be on and High Beam
Assist system will turn OFF.
• If the headlamp switch is placed
to the headlamp ON position,
High Beam Assist system will turn
off and the low beam will be on
continuously.

05
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Turn signals and lane change signals
ODN8A059207
To signal a turn, push down on the lever
for a left turn or up for a right turn in
position (A).
If an indicator stays on and does not flash
or if it flashes abnormally, one of the turn
signal bulbs may be burned out and will
require replacement.
One touch turn signal function
To activate the One Touch Turn Signal
function, push the turn signal lever up or
down to position (B) and then release it.
The lane change signals will blink 3, 5 or
7 times.
You can activate or deactivate the One
Touch Turn Signal function or choose
the number of blinks (3, 5, or 7) from the
User Settings mode in the LCD display.
Battery saver function
The purpose of this feature is to prevent
the battery from being discharged.
The system automatically turns off the
parking lamp when the driver turns the
vehicle off and opens the driver-side
door.
With this feature, the parking lamps will
turn off automatically if the driver parks
on the side of road at night.
If necessary, to keep the lamps on when
the vehicle is turned off, perform the
following:
(1) Open the driver-side door.
(2) Turn the parking lamps OFF and ON
again using the headlamp switch on
the steering column.
Headlamp delay function
If you place the ignition switch in the
ACC or OFF position with the headlamps
ON, the headlamps (and/or position
lamps) remain on for about 5 minutes.
However, with the engine off if the
driver’s door is opened and closed, the
headlamps (and/or position lamps) are
turned off after 15 seconds.
The headlamps (and/or position lamps)
can be turned off by pressing the lock
button on the remote key or smart key
twice or turning the light switch to the
OFF or AUTO position. However, if you
turn the light switch to the AUTO position
when it is dark outside, the headlamps
will not be turned off.