2023 HYUNDAI SONATA HYBRID Owners Manual

06
6 -7
Engine Stop/Start button positions
Button
Position Action
Notice
OFF To turn off the engine, press the
Engine Start/Stop button with shift
button in P (Park).
If the Engine Start/Stop button is
pressed with the vehicle shifted to D
(Drive), R (Reverse), or N ( Neutral),
the gear automatically shifts to P
(Park).
ACC Press the Engine Start/Stop button
when the button is in the OFF
position without depressing the
brake pedal.
Electrical accessories are usable. If you leave the Engine Start/Stop
button in the ACC position for more
than one hour, the battery power will
turn off automatically to prevent the
battery from discharging.
ON Press the Engine Start/Stop button
while it is in the ACC position
without depressing the brake pedal.
The warning lights can be checked
before the engine is started. Do not leave the Engine Start/Stop
button in the ON position when the
engine is not running to prevent the
battery from discharging.
START To start the engine, depress the
brake pedal and press the Engine
Start/Stop button with the shift
button in the P (Park) position.
If you press the Engine Start/Stop
button without depressing the brake
pedal, the engine does not start
and the Engine Start/Stop button
changes as follows:
OFF → ACC → ON → OFF or ACC
However, the engine may start if you
depress the brake pedal within 0.5
second after pressing the Engine
Start/Stop button from the OFF
position.

While Driving
6-8
Starting the engine
WARNING
• Always wear appropriate shoes when
operating your vehicle.
Unsuitable shoes, such as high heels,
ski boots, sandals, flip-flops, etc.,
may interfere with your ability to use
the brake and accelerator pedals.
• Do not start the vehicle with the
accelerator pedal depressed. The
vehicle can move and lead to an
accident.
• Wait until the engine rpm is normal.
The vehicle may suddenly move if
the brake pedal is released when the
rpm is high.
Information
• The engine will start by pressing the
Engine Start/Stop button, only when
the smart key is in the vehicle.
• Even if the smart key is in the vehicle,
if it is far away from the driver, the
engine may not start.
• When the Engine Start/Stop button
is in the ACC or ON position, if any
door is open, the system checks for the
smart key. If the smart key is not in the
vehicle, the “
” indicator will blink
and the warning "Key not in vehicle"
will come on and if all doors are closed,
the chime will also sound for about
5 seconds. Keep the smart key in the
vehicle when using the ACC position or
if the vehicle engine is ON.
1. Always carry the smart key with you.
2. Make sure the parking brake is
applied.
3. Make sure the gear is in P (Park).
4. Depress the brake pedal.
5. Press the Engine Start/Stop button. If
the vehicle starts, the “” indicator
will come on.
Information
• Do not wait for the engine to warm up
while the vehicle remains stationary.
Start driving at moderate engine
speeds. (Aggressive accelerating and
decelerating should be avoided.)
• Always start the vehicle with your foot
on the brake pedal. Do not depress the
accelerator while starting the vehicle.
Do not rev the engine while warming
it up.
• If ambient temperature is low,
the “” indicator may remain
illuminated longer than the normal
amount of time.
NOTICE
To prevent damage to the vehicle:
• If the “” indicator turns off while
you are in motion, do not attempt to
move the shift button to the P (Park)
position.
• Do not push or tow your vehicle to
start the engine.

06
6-9
NOTICE
To prevent damage to the vehicle:
When the stop lamp switch fuse is
blown, you can't start the engine
normally. Replace the fuse with a new
one. If you are not able to replace
the fuse, you can start the engine by
pressing and holding the Engine Start/
Stop button for 10 seconds with the
Engine Start/Stop button in the ACC
position.
Do not press the Engine Start/Stop
button for more than 10 seconds except
when the stop lamp switch fuse is
blown.
For your safety always depress the
brake pedal before starting the engine.
Emergency starting
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If the smart key battery is weak or the
smart key does not work correctly, you
can start the engine by pressing the
Engine Start/Stop button with the smart
key in the direction of the picture above.
Remote Start
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You can start the vehicle using the
Remote Start button of the smart key.
To start the vehicle remotely:
• Lock the doors by pressing the door
lock button within 32 feet (10 m)
distance from the vehicle.
• Press the remote start button for over
2 seconds within 4 seconds after
locking the doors and the hazard
warning will blink.
To turn off the remote start function,
press the remote start button once.
In case of the manual operation,
the climate control system will be
maintained even when the engine is
turned OFF. However, the automatic
operation is set to 72°F(22°C).

While Driving6-10
If your vehicle is parked and the engine
is left on for a long period of time, the
engine will turn off automatically to help
reduce fuel consumption and prevent
accidents caused by carbon dioxide
poisoning.
Operating Conditions
Vehicle Auto-Shut Off timer operates
when all the following conditions are
satisfied:
• Vehicle speed is below 1.8 mph (3
km/h), and the gear is shifted to P
(Park)
• The brake pedal and accelerator pedal
are not depressed
• The driver’s seat belt is unfastened
• The passenger seat is empty
• The infotainment system is being
updated
Deactivating Conditions
Vehicle Auto-Shut Off timer turns off
when one of the situation occur:
• Vehicle speed is above 1.8 mph (3
km/h)
• The gear is shifted to R (Reverse), D
(Drive) or N (Neutral)
• The brake pedal or accelerator pedal
is depressed
• The driver’s seat belt is fastened
• A passenger is in the passenger’s seat
System Operation
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When all the conditions are satisfied, the
Vehicle Auto-Shut Off operates and turns
the engine off automatically after 60
minutes.
A timer appears on the instrument
cluster 30 minutes before vehicle shut
off.
Resetting cluster timer
To reset the cluster timer, do one of
following:
• Release the accelerator pedal or brake
pedal after Vehicle Auto-Shut Off is
complete.
• Press the OK button on the steering
wheel while the timer appears on the
instrument cluster.
CAUTION
Do not leave a passenger or a pet in
the vehicle in hot weather since the air
conditioning system turns off when the
engine is off.
VEHICLE AUTO-SHUT OFF

06
6-11
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Automatic Transmission Operation
The automatic transmission has six forward speeds and one reverse speed. The
individual speeds are selected automatically in the D (Drive) position. The indicator in
the instrument cluster displays the shift button position when the ignition switch is in
the ON position.
WARNING
The automatic transmission shift button or interior parts might get hot when a
vehicle is parked outside during hot weather. Always be careful when the vehicle is
hot.
AUTOMATIC TRANSMISSION

While Driving
6-12
WARNING
To reduce the risk of serious injury or
death:
• ALWAYS check the surrounding
areas near your vehicle for people,
especially children, before shifting a
vehicle into D (Drive) or R (Reverse).
• Before leaving the driver’s seat,
always make sure the gear is in
the P (Park) position, then set
the parking brake, and place the
ignition switch in the LOCK/OFF
position. Unexpected and sudden
vehicle movement can occur if these
precautions are not followed.
• If equipped, do not use the engine
brake (shifting from a high gear to
lower gear using the paddle shifters)
rapidly on slippery roads.
P (Park)
Always come to a complete stop before
shifting into P (Park).
To shift from P (Park), you must depress
firmly on the brake pedal and make sure
your foot is off the accelerator pedal.
The gear must be in P (Park) before
turning the engine off.
WARNING
• Shifting into P (Park) while the
vehicle is in motion may cause you to
lose control of the vehicle.
• After the vehicle has stopped, always
make sure the gear is in P (Park),
apply the parking brake, and turn
the engine off.
• Do not use the P (Park) position in
place of the parking brake.
R (Reverse)
Use this position to drive the vehicle
backward.
NOTICE
Always come to a complete stop before
shifting into or out of R (Reverse); you
may damage the transmission if you
shift into R (Reverse) while the vehicle is
in motion.
When the vehicle is stopped in
R (Reverse) position, if you open
the driver's door with the seat belt
unfastened, the gear is shifted to P (Park)
position automatically.
However when the vehicle moves
in R (Reverse) position, if you open
the driver's door with the seat belt
unfastened, the gear may be not shifted
to P (Park) position automatically for
protecting the automatic transmission.
N (Neutral)
The wheels and transmission are not
engaged.
Shift into P (Park) if you need to leave
your vehicle for any reason.
Always depress the brake pedal when
you are shifting from N (Neutral) to
another gear.
WARNING
Do not shift into gear unless your foot is
firmly on the brake pedal. Shifting into
gear when the engine is running at high
speed can cause the vehicle to move
very rapidly. You could lose control of
the vehicle and hit people or objects.

06
6-13
D (Drive)
This is the normal driving position. The
transmission will automatically shift
through a 6-gear sequence, providing
the best fuel economy and power.
To start the vehicle forward, push the D
(Drive) button by depressing the brake
pedal with the engine ON. Then depress
the accelerator pedal smoothly.
For extra power when passing another
vehicle or driving uphill, depress the
accelerator fully. The transmission will
automatically downshift to the next
lower gear (or gears, as appropriate).
When the vehicle is stopped in D (Drive)
position, if you open the driver's door
with the seat belt unfastened, the gear is
shifted to P (Park) position automatically.
However when the vehicle moves in D
(Drive) position, if you open the driver's
door with the seat belt unfastened, the
gear may not shift to P (Park) position
automatically to protect the automatic
transmission.
Shift-lock system
For your safety, the automatic
transmission has a shift-lock system
which prevents shifting the gear from
P (Park) or N (Neutral) to R (Reverse)
or D (Drive) unless the brake pedal is
depressed.
To shift the gear from P (Park) or N
(Neutral) to R (Reverse) or D (Drive):
1. Depress and hold the brake pedal.
2. Start the engine.
3. Depress the brake pedal and push the
R (Reverse) or D (Drive) button.
Stay in N (Neutral) position when
engine is Off
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If you want to keep the N (Neutral)
position after the engine is OFF, do the
following.
1. Deactivate the AUTO HOLD and
release the parking brake when the
ignition switch or the engine is ON.
2. Push the N (neutral) button while
depressing the brake pedal. If the
message ("Press and hold OK button
to stay in Neutral when vehicle is
OFF") appears on the cluster LCD
display, press and hold the OK button
on the steering wheel for more than 1
second.
3. When the message ("Vehicle will
stay in (N). Change gear to cancel")
appears on the cluster LCD display,
turn off the engine.

While Driving
6-14
When the battery is discharged:
You cannot shift the gear when the
battery is discharged.
In emergencies, do the following to
move the shift button to N (Neutral) on a
level ground.
1. Connect the battery cables from
another vehicle or from a another
battery to the jump-starting terminals
inside the engine compartment.
For more information refer to "Jump
Starting" in chapter 7.
2. Release the parking brake with the
Engine Start/Stop button in the ON
position.
3. Shift the gear to the N(Neutral)
position. Refer to the "Stay in N
(Neutral) position when engine is Off"
in this chapter.
Parking
Always come to a complete stop and
continue to depress the brake pedal.
Press the P button, apply the parking
brake, and place the ignition switch in
the LOCK/OFF position. Take the Key
with you when exiting the vehicle.
• The gear is shifted to P (Park) position
automatically for safety under the
following conditions.
-When the driver unfastens the seat
belt and opens the driver’s door.
-When the engine is turned off with
the gear shifted to R (Reverse), D
(Drive) or N (Neutral).
WARNING
When you stay in the vehicle with
the engine running, be careful not to
depress the accelerator pedal for a long
period of time. The engine or exhaust
system may overheat and start a fire.
The exhaust gas and the exhaust system
are very hot. Keep away from the
exhaust system components.
Do not stop or park over flammable
materials, such as dry grass, paper or
leaves. They may ignite and cause a fire.