2015 Hyundai Sonata Hybrid overheating

Safety features of your vehicle
10
3
Seat warmer (if equipped)
The seat warmer is provided to warm the
front seats during cold weather. With the
engine start/stop button in the ON position,
push either of the switches to warm the dri-
ver's seat or the front passenger's seat.
During mild weather or under conditions
where the operation of the seat warmer is
not needed, keep the switches in the
"OFF" position.
The temperature setting of the seat is
changed as follows :
✽ ✽ NOTICE
With the seat warmer switch in the LO
or HI position, the heating system in the
seat turns off or on automatically
depending on the seat temperature.
CAUTION
When cleaning the seats, do not
use an organic solvent such asthinner, benzene, alcohol or gaso- line. Doing so may damage thesurface of the heater or seats.
To prevent overheating the seat warmer, do not place anything onthe seats, that insulates against heat, such as blankets, cushionsor seat covers while the seatwarmer is in operation.
Do not place heavy or sharp objects on seats equipped withseat warmers. Damage to the seat warming components could occur.
WARNING- Seat warmer burns
Passengers should use extreme
caution when using seat warmers
due to the possibility of excess
heating or burns. The occupants
must be able to feel if the seat is
becoming too warm and to turn the
seat warmer off. The seat warmer
may cause burns even at low tem-
peratures, especially if used for
long periods of time. In particular,
the driver must exercise extreme
care for the following types of pas-
sengers:
1. Infants, children, elderly or dis-
abled persons, or hospital outpa-
tients
2. Persons with sensitive skin or those that burn easily
3. Fatigued individuals
4. Intoxicated individuals
5. Individuals taking medication that can cause drowsiness or
sleepiness (sleeping pills, cold
tablets, etc.)
OYF039013N
Switch
position LO Center HI
TemperatureLOWOFFHIGH

Features of your vehicle
42
4
Speedometer
The speedometer indicates the speed of
the vehicle.
The speedometer is calibrated in miles
per hour and/or kilometers per hour.
Engine temperature gauge
This gauge shows the temperature of the
engine coolant when the engine start/stop
button is ON.
Do not continue driving with an overheat-
ed engine. If your vehicle overheats, refer
to “If the engine overheats” in section 6.
WARNING
Never remove the radiator cap
when the engine is hot. The engine
coolant is under pressure and
could cause severe burns. Wait
until the engine is cool before
adding coolant to the reservoir.
OYFH041047NOYFH041043N
CAUTION
If the gauge moves beyond the nor-
mal range area toward the “H” posi-tion, it indicates overheating thatmay damage the engine.

459
Features of your vehicle
If the battery in the Smart Key remoteis weak, the engine may not start when
you push the start/stop button (and the
indicator will flash). Place the smart
key into the smart key holder in the
center console. If the vehicle now
starts nor mally, replace the battery
inside the smart key fob. If the indicator
still flashes, the system may need
repair. Contact an authorized HYUNDAI
dealer for assistance.Low fuel level warning light
This warning light indicates the fuel tank
is nearly empty. When it comes on, you
should add fuel as soon as possible.
Driving with the fuel level warning light on
or with the fuel level below “E” can cause
the engine to misfire and damage the
catalytic converter.
Engine coolant temperature warning light(if equipped)
The warning light illuminates if the tem-
perature of the engine coolant is above
257±4.5°F (125±2.5°C).
Do not continue driving with an overheat-
ed engine. If your vehicle overheats, refer
to “Overheating” in Chapter 6.
Malfunction indicator light(MIL) (check engine light)
This indicator light is part of the Engine
Control System which monitors various
emission control system components. If
this light illuminates while driving, it indi-
cates that a potential malfunction has
been detected somewhere in the emis-
sion control system.
This light will also illuminate when the
engine start/stop button is in the ON
position, and will go out in a few seconds
after the engine is started. If it illuminates
while driving, or does not illuminate when
the engine start/stop button is in the ON
position, take your vehicle to your near-
est authorized HYUNDAI dealer and
have the system checked.
Generally, your vehicle will continue to be
drivable, but have the system checked by
an authorized HYUNDAI dealer promptly.

Features of your vehicle
92
4
✽
✽
NOTICE
• While using the air conditioning sys-
tem, monitor the engine temperature
gauge closely while driving up hills or
in heavy traffic when outside temper-
atures are high. Air conditioning sys-
tem operation may cause engine over-
heating. Continue to use the blower
fan but turn the air conditioning sys-
tem off if the engine temperature
gauge indicates engine overheating.
• Opening the windows in humid weather while the air conditioning
operates may create water droplets
inside the vehicle. Since excessive
water droplets may cause damage to
electrical equipment, air conditioning
should only be used with the windows
closed.
Air conditioning system operation tips
If the vehicle has been parked in direct
sunlight during hot weather, open the
windows for a short time to let the hot
air inside the vehicle escape.
To help reduce moisture inside of the windows on rainy or humid days,
decrease the humidity inside the vehi-
cle by operating the air conditioning
system.
During air conditioning system opera- tion, you may occasionally notice a
slight change in engine speed as the
air conditioning compressor cycles.
This is a normal system operation
characteristic.
Use the air conditioning system every month for a few minutes to ensure
maximum system performance.
When using the air conditioning sys- tem, you may notice clear water drip-
ping (or even puddling) on the ground
under the passenger side of the vehi-
cle. This is a normal system operation
characteristic. Operating the air conditioning system
in the recirculated air position provides
maximum cooling, however, continual
operation in this mode may cause the
air inside the vehicle to become stale.
During cooling operation, you may occasionally notice a misty air flow
because of rapid cooling and humid air
intake. This is a normal system opera-
tion characteristic.
If you operate the air conditioner excessively, the difference between the
temperature of the outside air and that
of the windshield could cause the outer
surface of the windshield to fog up,
causing loss of visibility. In this case,
set the mode selection knob or button
to the position and fan speed con-
trol to the lower speed.

4103
Features of your vehicle
✽
✽NOTICE
• While using the air conditioning sys-
tem, monitor the engine temperature
gauge closely while driving up hills or
in heavy traffic when outside temper-
atures are high. Air conditioning sys-
tem operation may cause engine over-
heating. Continue to use the blower
fan but turn the air conditioning sys-
tem off if the engine temperature
gauge indicates engine overheating.
• Opening the windows in humid weather while the air conditioning
operates may create water droplets
inside the vehicle. Since excessive
water droplets may cause damage to
electrical equipment, air conditioning
should only be used with the windows
closed.
Air conditioning system operation tips
If the vehicle has been parked in direct
sunlight during hot weather, open the
windows for a short time to let the hot
air inside the vehicle escape.
To help reduce moisture inside of the windows on rainy or humid days,
decrease the humidity inside the vehi-
cle by operating the air conditioning
system.
During air conditioning system opera- tion, you may occasionally notice a
slight change in engine speed as the
air conditioning compressor cycles.
This is a normal system operation
characteristic.
Use the air conditioning system every month for a few minutes to ensure
maximum system performance.
When using the air conditioning sys- tem, you may notice clear water drip-
ping (or even puddling) on the ground
under the passenger side of the vehi-
cle. This is a normal system operation
characteristic. Operating the air conditioning system
in the recirculated air position provides
maximum cooling, however, continual
operation in this mode may cause the
air inside the vehicle to become stale.
During cooling operation, you may occasionally notice a misty air flow
because of rapid cooling and humid air
intake. This is a normal system opera-
tion characteristic.
If you operate the air conditioner excessively, the difference between the
temperature of the outside air and that
of the windshield could cause the outer
surface of the windshield to fog up,
causing loss of visibility. In this case,
set the mode selection knob or button
to the position and fan speed con-
trol to the lower speed.

Features of your vehicle
114
4
✽
✽
NOTICE
• While using the air conditioning sys-
tem, monitor the engine temperature
gauge closely while driving up hills or
in heavy traffic when outside temper-
atures are high. Air conditioning sys-
tem operation may cause engine over-
heating. Continue to use the blower
fan but turn the air conditioning sys-
tem off if the engine temperature
gauge indicates engine overheating.
• Opening the windows in humid weather while the air conditioning
operates may create water droplets
inside the vehicle. Since excessive
water droplets may cause damage to
electrical equipment, air conditioning
should only be used with the windows
closed.
Air conditioning system operation tips
If the vehicle has been parked in direct
sunlight during hot weather, open the
windows for a short time to let the hot
air inside the vehicle escape.
To help reduce moisture inside of the windows on rainy or humid days,
decrease the humidity inside the vehi-
cle by operating the air conditioning
system.
During air conditioning system opera- tion, you may occasionally notice a
slight change in engine speed as the
air conditioning compressor cycles.
This is a normal system operation
characteristic.
Use the air conditioning system every month for a few minutes to ensure
maximum system performance.
When using the air conditioning sys- tem, you may notice clear water drip-
ping (or even puddling) on the ground
under the passenger side of the vehi-
cle. This is a normal system operation
characteristic. Operating the air conditioning system
in the recirculated air position provides
maximum cooling, however, continual
operation in this mode may cause the
air inside the vehicle to become stale.
During cooling operation, you may occasionally notice a misty air flow
because of rapid cooling and humid air
intake. This is a normal system opera-
tion characteristic.
If you operate the air conditioner excessively, the difference between the
temperature of the outside air and that
of the windshield could cause the outer
surface of the windshield to fog up,
causing loss of visibility. In this case,
set the mode selection knob or button
to the position and fan speed con-
trol to the lower speed.

523
Driving your vehicle
Good braking practices
Check to be sure the parking brake isnot engaged and that the parking brake
indicator light is out before driving away. Driving through water may get the
brakes wet. They can also get wet when
the car is washed. Wet brakes can be
dangerous! Your car will not stop as
quickly if the brakes are wet. Wet brakes
may cause the car to pull to one side.
To dry the brakes, apply the brakes light-
ly until the braking action returns to nor-
mal, taking care to keep the car under
control at all times. If the braking action
does not return to normal, stop as soon
as it is safe to do so and call an author-
ized HYUNDAI dealer for assistance.
Don't coast down hills with the car out of gear. This is extremely hazardous. Keep
the car in gear at all times, use the
brakes to slow down, then shift to a
lower gear so that engine braking will
help you maintain a safe speed.
Don't "ride" the brake pedal. Resting your foot on the brake pedal while driv-
ing can be dangerous because it can
result in the brakes overheating and los-
ing their effectiveness. It also increases
the wear of the brake components.
If a tire goes flat while you are driving, apply the brakes gently and keep the car
pointed straight ahead while you slow
down. When you are moving slowly
enough for it to be safe to do so, pull off
the road and stop in a safe place. If your vehicle is equipped with an auto-
matic transaxle, don't let your vehicle
creep forward. To avoid creeping for-
ward, keep your foot firmly on the brake
pedal when the vehicle is stopped.
Use caution when parking on a hill. Firmly engage the parking brake and
place the shift lever in P position. If your
vehicle is facing downhill, turn the front
wheels into the curb to help keep the
vehicle from rolling. If your vehicle is fac-
ing uphill, turn the front wheels away
from the curb to help keep the vehicle
from rolling. If there is no curb or if it is
required by other conditions to keep the
vehicle from rolling, block the wheels.
Under some conditions your parking brake can freeze in the engaged posi-
tion. This is most likely to happen when
there is an accumulation of snow or ice
around or near the rear brakes or if the
brakes are wet. If there is a risk that the
parking brake may freeze, apply it only
temporarily while you put the gear
selector lever in P positionand block
the rear wheels so the vehicle cannot
roll. Then release the parking brake.
Do not hold the vehicle on an hill with the accelerator pedal. This can cause
the transaxle to overheat. Always use
the brake pedal or parking brake.
WARNING
Whenever you leave or park yourvehicle, always firmly set the
parking brake as far as possible
and fully engage the vehicle's
transaxle into the P (Park) posi-
tion. If the parking brake is not
fully engaged, the vehicle may
move inadvertently and injure
yourself and others.
Always have the parking brake fully engaged when parking to
avoid inadvertent movement of
the vehicle which can injure
occupants or pedestrians.
CAUTION
Do not depress the brake pedal con-tinuously without READY status. Thebattery may be discharged.

Driving your vehicle
30
5
Hazardous driving conditions
When hazardous driving conditions are
encountered such as water, snow, ice,
mud, sand, or similar hazards, follow
these suggestions:
Drive cautiously and allow extra dis-
tance for braking.
Avoid sudden changes in braking or steering.
If stalled in snow, mud, or sand, use second gear. Accelerate slowly to
avoid spinning the drive wheels.
Use sand, rock salt, tire chains, or other non-slip material under the drive
wheels to provide traction when stalled
in ice, snow, or mud.
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 any forward gear. Do not race the
engine, and spin the wheels as little as
possible. If you are still stuck after a few
tries, have the vehicle pulled out by a tow
vehicle to avoid engine overheating and
possible damage to the transaxle.
✽ ✽ NOTICE
The ESC system should be turned OFF
prior to rocking the vehicle.
SPECIAL DRIVING CONDITIONS
WARNING - ABS
Do not pump the brake pedal on a
vehicle equipped with ABS.
WARNING - Downshifting
Downshifting with an automatic
transaxle, 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 slip-
pery surfaces.
CAUTION
Prolonged rocking may cause
engine over-heating, transaxle dam-age or failure, and tire damage.
WARNING- Spinning tires
Do not spin the wheels, especially
at speeds more than 35 mph (56
km/h). Spinning the wheels at high
speeds when the vehicle is station-
ary could cause a tire to overheat
which could result in tire damage
that may injure bystanders.