2019 Hyundai Sonata check engine

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Warning messages
(if equipped)
Shift to P(for smart key system and auto-matic transaxle)
This warning message illuminates
if you try to turn off the engine with-
out the shift lever in P (Park) posi-
tion.
At this time, the Engine Start/Stop button turns to the ACC position (If
you press the Engine Start/Stop
button once more, it will turn to the
ON position).
Low Key Battery (for smart key system)
This warning message illuminates
if the battery of the smart key is
discharged when the Engine
Start/Stop button changes to the
OFF position.
Press START button while turning wheel (for smart key system)
This warning message illuminates
if the steering wheel does not
unlock normally when the Engine
Start/Stop button is pressed.
It means that you should press the Engine Start/Stop button while
turning the steering wheel right
and left.
Steering wheel not locked (for smart key system)
This warning message illuminates
if the steering wheel does not lock
when the Engine Start/Stop button
changes to the OFF position.
Check steering wheel lock system (for smart key system)
This warning message illuminates
if the steering wheel does not lock
normally when the Engine Start/
Stop button changes to the OFF
position.
Press brake pedal to startengine (for smart key systemand automatic transaxle)
This warning message illuminates
if the Engine Start/Stop button
changes to the ACC position twice
by pressing the button repeatedly
without depressing the brake
pedal.
It means that you should depress the brake pedal to start the engine.
Key not in vehicle(for smart key system)
This warning message illuminates
if the smart key is not in the vehicle
when you press the Engine Start/
Stop button.
It means that you always have the smart key with you.
Key not detected (for smart key system)
This warning message illuminates
if the smart key is not detected
when you press the Engine Start/
Stop button.
Convenient features of your vehicle

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Convenient features of your vehicle
Press START button again (for smart key system)
This warning message illuminates
if you can not operate the Engine
Start/Stop button when there is a
problem with the Engine Start/Stop
button system.
It means that you could start the engine by pressing the Engine
Start/Stop button once more.
If the warning illuminates each time you press the Engine Start/
Stop button, we recommend that
you have the vehicle inspected by
an authorized HYUNDAI dealer.
Press START button with key(for smart key system)
This warning message illuminates
if you press the Engine Start/Stop
button while the warning message
"Key not detected" is illuminating.
At this time, the immobilizer indica- tor light blinks.
Check BRAKE SWITCH fuse (for smart key system and auto-matic transaxle)
This warning message illuminates
if the brake switch fuse is discon-
nected.
It means that you should replace the fuse with a new one. If that is
not possible, you can start the
engine by pressing the Engine
Start/Stop button for 10 seconds in
the ACC position.
Shift to P or N to start engine(for smart key system and auto-matic transaxle)
This warning message illuminates
if you try to start the engine with
the shift lever not in the P (Park) or
N (Neutral) position.
Information
You can start the engine with the shift
lever in the N (Neutral) position. But,
for your safety, we recommend that
you start the engine with the shift
lever in the P (Park) position.
Door, Hood, Trunk Open
It means that any door, hood, or
trunk is open.
i
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Before driving the vehicle, you
should confirm that the door/
hood/trunk is fully closed.
Also, check there is no door/
hood/trunk open warning light
or message displayed on the
instrument cluster.
CAUTION

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Convenient features of your vehicle
3
Parking Brake & BrakeFluid Warning Light
This warning light illuminates:
Once you set the ignition switch or
the Engine Start/Stop button to the
ON position.
- It illuminates for approximately 3seconds.
- It remains on if the parking brake is applied.
When the parking brake is applied.
When the brake fluid level in the reservoir is low.
- If the warning light illuminateswith the parking brake released, it
indicates the brake fluid level in
reservoir is low.
If the brake fluid level in the reser-
voir is low:
1. Drive carefully to the nearest safe location and stop your vehicle.
2. With the engine stopped, check the brake fluid level immediately and
add fluid as required (For more
information, refer to "Brake
Fluid" in chapter 7) . Then check all
brake components for fluid leaks. If
any leak on the brake system is still
found, the warning light remains on,
or the brakes do not operate prop-
erly, do not drive the vehicle. In this
case, have your vehicle inspected
by an authorized HYUNDAI dealer.
Dual-diagonal braking system
Your vehicle is equipped with dual-
diagonal braking systems. This
means you still have braking on two
wheels even if one of the dual sys-
tems should fail.
With only one of the dual systems
working, more than normal pedal
travel and greater pedal pressure are
required to stop the vehicle.
Also, the vehicle will not stop in as
short a distance with only a portion
of the brake system working.
If the brakes fail while you are driv-
ing, shift to a lower gear for addition-
al engine braking and stop the vehi-
cle as soon as it is safe to do so.

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Convenient features of your vehicle
Malfunction IndicatorLamp (MIL)
This warning light illuminates:
Once you set the ignition switch or
Engine Start/Stop button to the ON
position.
- It remains on until the engine isstarted.
When there is a malfunction with the emission control system.
In this case, have your vehicle
inspected by an authorized
HYUNDAI dealer. - Malfunction Indicator Lamp (MIL)
Driving with the Malfunction
Indicator Lamp (MIL) on may cause
damage to the emission control
systems which could affect dri-
vability and/or fuel economy.
If the Malfunction Indicator Lamp
(MIL) illuminates, potential catalyt-
ic converter damage is possible
which could result in loss of
engine power.
In this case, have your vehicle
inspected by an authorized
HYUNDAI dealer.
Charging System
Warning Light
If this warning light comes on while
the engine is running, the battery is
not being charged. Immediately turn
off all electrical accessories. Try not
to use electrically operated controls,
such as the power windows. Keep the
engine running; starting the engine
will quickly discharge the battery.
If there is a malfunction with either
the alternator or electrical charging
system:
1.Drive carefully to the nearest safe
location and stop your vehicle.
2.Turn the engine off and check the alternator drive belt for looseness
or breakage.
If the belt is adjusted properly,
there may be a problem in the elec-
trical charging system.
In this case, have your vehicle
inspected by an authorized
HYUNDAI dealer.
NOTICE
NOTICE

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Convenient features of your vehicle
3
Engine Oil PressureWarning Light
This warning light illuminates:
Once you set the ignition switch or
the Engine Start/Stop button to the
ON position.
- It remains on until the engine isstarted.
When the engine oil pressure is low.
If the engine oil pressure is low:
1. Drive carefully to the nearest safe location and stop your vehicle.
2. Turn the engine off and check the engine oil level (For more infor-
mation, refer to "Engine Oil" in
chapter 7). If the level is low, add
oil as required.
If the warning light remains on
after adding oil and restarting the
engine or if oil is not available, turn
off the engine. There is a mechan-
ical concern that needs to be
repaired before you can continue
driving. In this case, have your
vehicle inspected by an author-
ized HYUNDAI dealer. - Engine Oil Pressure Warning light
To prevent severe engine damage,
after the Engine Oil Pressure
Warning Light is illuminated and as
soon as it is safe to do so, turn the
engine off and check the oil level.
If the oil level is low, fill the engine
oil to the proper level and start the
engine again. If the light stays on
with the engine running, turn the
engine off immediately.
In this case, have your vehicle
inspected by an authorized
HYUNDAI dealer.
Low Fuel Level
Warning Light
This warning light illuminates:
When the fuel tank is nearly empty.
Add fuel as soon as possible.
- Low Fuel Level
Driving with the Low Fuel Level
warning light on or with the fuel
level below "E" can cause the
engine to misfire and damage the
catalytic converter (if equipped).
NOTICE
NOTICE

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Convenient features of your vehicle
3
AFLS (Adaptive Front LightingSystem) a.k.a. DBL (DynamicBending Light) (if equipped)
Adaptive front lighting system uses
the steering angle and vehicle speed
to help maximize your field of vision
by swiveling and leveling the head-
lamp.
Change the switch to the AUTO posi-
tion when the engine is running. The
adaptive front lighting system will
operate when the headlamps are
ON. To turn off the AFLS, change the
switch to other positions. After turn-
ing the AFLS off, headlamp swiveling
no longer occurs, but the leveling will
operate continuously. If the AFLS malfunction indicator
comes on, the AFLS is not working
properly. Drive to the nearest safe
location and restart the engine. If the
indicator continuously remains on,
we recommend that the system be
checked by an authorized HYUNDAI
dealer.
Daytime running light (DRL)
(if equipped)
The Daytime Running Lights (DRL)
can make it easier for others to see
the front of your vehicle during the
day, especially after dawn and before
sunset.
for U.S.A
The DRL will turn off when:
• Type A
1. The light switch is not in the AUTO
position.
2. The parking brake is applied.
3. The engine is turned off.

1. The light switch is not in DRL posi- tion.
2. The parking brake is applied.
3. The engine is turned off.
for Canada
The DRL will turn off when:
1. The light switch is in the headlamp position, including the operation
that the headlamp is turned on
automatically in the AUTO light
position.
2. The parking brake is applied.
3. The engine is turned off.
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Wireless Cellular Phone
Charging System (if equipped)
There is a wireless cellular phone
charging inside the front console.
The system is available when all
doors are closed, and when the
Engine Start/Stop button is in the
ACC/ON position.
To charge a cellular phone
The wireless cellular phone charging
system charges only the Qi-enabled
cellular phones ( ). Read the label
on the cellular phone accessory
cover or visit your cellular phone
manufacturer's website to check
whether your cellular phone supports
the Qi technology.
The wireless charging process starts
when you put a Qi-enabled cellular
phone on the wireless charging unit.1. Remove other items, including the
smart key, from the wireless charg-
ing unit. If not, the wireless charg-
ing process may be interrupted.
2. The indicator illuminates in orange during the charging process. The
indicator color changes to green,
when the charging process is
completed.
3. You can turn ON or OFF the wire- less charging function in the user
settings mode on the instrument
cluster. (For further information,
refer to the "LCD Modes" in this
chapter.)
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Convenient features of your vehicle
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5-3
Driving your vehicle
5
Carbon monoxide (CO) gas is toxic. Breathing CO can cause unconsciousness and death.
Engine exhaust contains carbon monoxide which cannot be seen or smelled.
Do not inhale engine exhaust.
If at any time you smell engine exhaust inside the vehicle, open the windows immediately. Exposure to CO can cause
unconsciousness and death by asphyxiation.
Be sure the exhaust system does not leak.
The exhaust system should be checked whenever the vehicle is raised to change the oil or for any other purpose. If
you hear a change in the sound of the exhaust or if you drive over something that strikes the underneath side of the
vehicle, have the exhaust system checked as soon as possible by an authorized HYUNDAI dealer.
Do not run the engine in an enclosed area.
Letting the engine idle in your garage, even with the garage door open, is a hazardous practice. Run the engine only
long enough to start the engine and to move the vehicle out of the garage.
Avoid idling the engine for prolonged periods with people inside the vehicle.
If it is necessary to idle the engine for a prolonged period with people inside the vehicle , be sure to do so only in an
open area with the air intake set at "Fresh" and fan control set to high so fresh air is drawn into the interior.
Keep the air intakes clear.
To assure proper operation of the ventilation system, keep the ventilation air intakes located in front of the windshield
clear of snow, ice, leaves, or other obstructions.
If you must drive with the trunk open:
Close all windows.
Open instrument panel air vents.
Set the air intake control at "Fresh", the air flow control at "Floor" or "Face", and the fan control set to high.
WARNING