2018 Hyundai Sonata engine coolant

1-6
Your vehicle at a glance
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1. Engine coolant reservoir ...................7-26
2. Radiator cap .....................................7-27
3. Brake fluid reservoir ..........................7-29
4. Air cleaner.........................................7-31
5. Engine oil dipstick .............................7-23
6. Engine oil filler cap ...........................7-24
7. Windshield washer fluid reservoir .....7-30
8. Fuse box ...........................................7-57
9. Battery ..............................................7-37
OLF017006N
The actual engine room in the vehicle may differ from the illustration.

3-63
Convenient features of your vehicle
3
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1. Tachometer
2. Speedometer
3. Engine coolant temperature gauge
4. Fuel gauge
5. Warning and indicator lights
6. LCD display (including Trip computer)
OLF047100N/OLF047101N
■
■
Type A
The actual cluster in the vehicle may dif-
fer from the illustration.
■
■Type B

3-64
Convenient features of your vehicle
1. Tachometer
2. Speedometer
3. Engine coolant temperature gauge
4. Fuel gauge
5. Warning and indicator lights
6. LCD display (including Trip computer)
OLF047526N/OLF047527N
■
■Type C
The actual cluster in the vehicle may dif-
fer from the illustration.
■
■Type D

3-67
Convenient features of your vehicle
3
Do not operate the engine within
the tachometer's RED ZONE. This
may cause severe engine damage.
Engine Coolant TemperatureGauge
This gauge indicates the tempera-
ture of the engine coolant when the
ignition switch or Engine Start/Stop
button is ON. If the gauge pointer moves
beyond the normal range area
toward the "H" position, it indi-
cates overheating that may dam-
age the engine.
Do not continue driving with an
overheated engine. If your vehicle
overheats, refer to "If the Engine
Overheats" in chapter 6.
NOTICENOTICE
OLF047107
OLF047506
■
Type A, B
■ Type C, D
Never remove the radiator cap
when the engine is hot. The
engine coolant is under pres-
sure and could severely burn.
Wait until the engine is cool
before adding coolant to the
reservoir.
WARNING

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Sunroof Open (if equipped)
This warning message illuminates if
you turn off the engine when the sun-
roof is open.
Turn on FUSE SWITCH
This warning message illuminatesif the fuse switch located on the
fuse box under the steering wheel
is OFF.
It means that you should turn the fuse switch on.
For more details, refer to "Fuses"
in chapter 7.
Low Tire Pressure
This warning message illuminates if
the tire pressure is low with the igni-
tion switch or the Engine/Start Button
in ON position.
For more information, refer to
"Tire Pressure Monitoring System
(TPMS)" in chapter 6.
Low Washer Fluid
This warning message illuminates if the washer fluid level in the reser-
voir is nearly empty.
It means that you should refill the washer fluid.
Low Fuel
This warning message illuminatesif the fuel tank is nearly empty.
- When the low fuel level warninglight is illuminates.
- When the trip computer displays "--- mile (or km)" as distance to
empty.
Add fuel as soon as possible.
Engine has overheated
This warning message illuminates when the engine coolant tempera-
ture is above 248°F (120°C). This
means that the engine is overheat-
ed and may be damaged.
If your vehicle is overheated, refer
to "Overheating" in chapter 6.
Convenient features of your vehicle
OLF047696

5-49
Driving your vehicle
5
ECO mode
When the Drive Mode isset to ECO mode, the
engine and transmission
control logic are changed
to maximize fuel efficiency.
When the ECO mode is selected by pressing the DRIVE MODE but-
ton, the ECO indicator will illumi-
nate.
If the vehicle is set to ECO mode, when the engine is turned OFF
and restarted the Drive Mode set-
ting will remain in ECO mode.
Information
Fuel efficiency depends on the driver's
driving habit and road condition. When ECO mode is activated:
The acceleration response may be
slightly reduced as the accelerator
pedal is depressed moderately.
The air conditioner performance may be limited.
The shift pattern of the automatic transmission may change.
The engine noise may get louder.
The above situations are normal
conditions when ECO mode is acti-
vated to improve fuel efficiency. Limitation of ECO mode opera-
tion:
If the following conditions occur while
ECO mode is operating, the system
operation is limited even though
there is no change in ECO indicator.
When the coolant temperature is
low:
The system will be limited until
engine performance becomes nor-
mal.
When driving up a hill: The system will be limited to gain
power when driving uphill because
engine torque is restricted.
When driving the vehicle with the automatic transmission gear shift
lever in manual shift mode:
The system will be limited accord-
ing to the shift location.
When the accelerator pedal is deeply depressed for a few seconds:
The system will be limited, judging
that the driver wants to speed up.
i

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Driving your vehicle
5
Check spark plugs and ignitionsystem
Inspect your spark plugs as
described in chapter 7 and replace
them if necessary. Also check all
ignition wiring and components to be
sure they are not cracked, worn or
damaged in any way.
Use approved window washeranti-freeze in system
To keep the water in the window
washer system from freezing, add an
approved window washer anti-freeze
solution in accordance with instruc-
tions on the container. Window wash-
er anti-freeze is available from an
authorized HYUNDAI dealer and
most auto parts outlets. Do not use
engine coolant or other types of anti-
freeze as these may damage the
paint finish.
Do not let your parking brakefreeze
Under some conditions your parking
brake can freeze in the engaged
position. 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 the parking brake may
freeze, apply it only temporarily while
you put the gear selector lever in P
and block the rear wheels so the car
cannot roll. Then release the parking
brake.
Do not let ice and snow accu-mulate underneath
Under some conditions, snow and
ice can build up under the fenders
and interfere with the steering. When
driving in severe winter conditions
where this may happen, you should
periodically check underneath the
car to be sure the movement of the
front wheels and the steering com-
ponents is not obstructed.
Don't place foreign objects ormaterials in the engine com-partment
Placement of foreign object or mate-
rials which prevent cooling of the
engine, in the engine compartment,
may cause a failure or combustion.
The manufacturer is not responsible
for the damage caused by such
placement.
To keep locks from freezing
To keep the locks from freezing,
squirt an approved de-icer fluid or
glycerine into the key opening. If a
lock is covered with ice, squirt it with
an approved de-icing fluid to remove
the ice. If the lock is frozen internally,
you may be able to thaw it out by
using a heated key. Handle the heat-
ed key with care to avoid injury.

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What to do in an emergency
6
If your temperature gauge indicates
overheating, you experience a loss
of power, or hear loud pinging or
knocking, the engine may be over-
heating. If this happens, you should:
1. Pull off the road and stop as soonas it is safe to do so.
2. Place the shift lever in P (Park) and set the parking brake. If the air
conditioning is ON, turn it OFF.
3. If engine coolant is running out under the vehicle or steam is com-
ing out from the hood, stop the
engine. Do not open the hood until
the coolant has stopped running
or the steaming has stopped. If
there is no visible loss of engine
coolant and no steam, leave the
engine running and check to be
sure the engine cooling fan is
operating. If the fan is not running,
turn the engine off. 4. Check for coolant leaking from the
radiator, hoses or under the vehi-
cle. (If the air conditioning had
been in use, it is normal for cold
water to be draining from it when
you stop.)
5. If engine coolant is leaking out, stop the engine immediately and
call the nearest authorized
HYUNDAI dealer for assistance.
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While the engine is
running, keep hands,
clothing and tools
away from the mov-
ing parts such as the
cooling fan and drive
belt to prevent seri-
ous injury.
WARNING