2020 HYUNDAI SONATA HYBRID check engine light

01
1-13
Starting the Vehicle
Vehicles with smart key system
1. Carry the smart key or leave it inside
the vehicle.
2. Make sure the parking brake is firmly
applied.
3. Make sure the shift button is in P
(Park). With the shift button in N
(Neutral), you cannot start the vehicle.
4. Depress the brake pedal.
5. Press the Engine Start/Stop button.
If the hybrid system starts, the “”
indicator will come on.
Whether the engine is cold or warm, it
should be started without depressing
the accelerator.
After following the start procedures,
“
” indicator on the instrument
cluster will turn on. For more details,
please check chapter 6.
ECONOMICAL and SAFE OPERATION of
Hybrid system
• Drive smoothly. Accelerate at a
moderate rate and maintain a steady
cruising speed. Do not make “jack-
rabbit” starts. Do not race between
stoplights.
• Avoid heavy traffic whenever possible.
Always maintain a safe distance
from other vehicles so you can
avoid unnecessary braking. This also
reduces brake wear.
• The regenerative brake generates
energy when the vehicle decelerates.
• When the hybrid battery power is
low, the hybrid system automatically
recharges the hybrid battery.
• When the engine is running with the
shift button in N (Neutral), the hybrid
system cannot generate electricity.
The hybrid battery cannot recharge
with the shift button in N (Neutral).
Information
In the hybrid system, the engine
automatically runs and stops. When
the hybrid system operates, the “
”
indicator is illuminated.
In the following situation, the engine may
operate automatically.
- When the engine is ready to run
-When the hybrid battery is being
charged
-Depending on the temperature
condition of the hybrid battery
Special Features
Hybrid vehicles sound different than
gasoline engine vehicles. When the
hybrid system operates, you may hear
a sound from the hybrid battery system
behind the rear seat. If you apply the
accelerator pedal rapidly, you may hear
an unconventional sound. When you
apply the brake pedal, you may hear
a sound from the regenerative brake
system. When the hybrid system is
turned off or on, you may hear a sound
in the engine compartment. If you
depress the brake pedal repeatedly
when the hybrid system is turned on,
you may hear a sound in the engine
compartment. None of these sounds
indicate a problem. These are normal
characteristics of hybrid vehicles.
If any of following occur, it’s a normal
condition if you hear a motor sound in
the engine compartment:
-After turning off the hybrid system,
the brake pedal is released.
-When the hybrid system is turned off,
the brake pedal is applied.
-When the driver door is opened.
DRIVING THE HYBRID VEHICLE

Foreword
1-16
Warning and Indicator Lights
Ready indicator
This indicator illuminates:
When the vehicle is ready to be driven.
-ON : Normal driving is possible.
-OFF : Normal driving is not possible,
or a problem has occurred.
-Blinking : Emergency driving.
When the ready indicator goes OFF
or blinks, there is a problem with the
system. If this occurs, we recommend
that you have your vehicle inspected by
an authorized HYUNDAI dealer.
EV mode indicator
This indicator illuminates:
When the vehicle is driven by the electric
motor.
Service warning light
This warning light illuminates:
• When you set the ignition switch or
the Engine Start/Stop button to the
ON position.
-The service warning light illuminates
for approximately 3 seconds and
then turns off when all checks have
been performed.
• When there is a problem with the
hybrid vehicle control system or
hardware.
When the warning light illuminates
while driving, or does not go OFF after
starting the vehicle, we recommend that
you have the vehicle inspected by an
authorized HYUNDAI dealer.
Regenerative brake warning
light
(yellow)
This warning light illuminates:
When the regenerative brake does not
operate and the brake does not perform
well. This causes the Brake Warning
light (red) and Regenerative Brake
Warning Light (yellow) to illuminate
simultaneously.
If this occurs, drive safely and have
your vehicle inspected by an authorized
HYUNDAI dealer. The operation of the
brake pedal may be more difficult than
normal and the braking distance may
increase.

Vehicle Information
2-14
TIRE SPECIFICATION AND
PRESSURE LABEL
ODN8H019025L
The tires supplied on your new
vehicle are chosen to provide the best
performance for normal driving.
The tire label located on the driver’s
side center pillar gives the tire pressures
recommended for your car.
ENGINE NUMBER
ODN8H019022
The engine number is stamped on the
engine block as shown in the drawing.
• When the engine cover is equipped :
Put a flashlight and reflection mirror
into the undercover hole to check the
engine number.
• When the engine cover is detached :
Check the engine number using a
reflection mirror.

03
3-43
SRS warning light
The SRS (Supplement Restraint System)
air bag warning light on the instrument
panel displays the air bag symbol
depicted in the illustration. The system
checks the air bag electrical system for
malfunctions. The light indicates that
there is a potential malfunction with your
air bag system, which could include your
side and curtain air bags used for rollover
protection.
WARNING
If your SRS malfunctions, the air bag
may not inflate properly during an
accident increasing the risk of serious
injury or death.
If any of the following conditions occur,
your SRS is malfunctioning:
• The light does not turn on for
approximately six seconds when the
Engine Start/Stop button is in the ON
position.
• The light stays on after illuminating
for approximately six seconds.
• The light comes on while the vehicle
is in motion.
• The light blinks when the engine is
running.
Have an authorized HYUNDAI dealer
inspect the SRS as soon as possible if
any of these conditions occur. During a frontal collision, sensors will
detect the vehicle’s deceleration. If the
rate of deceleration is high enough, the
control unit will inflate the front air bags.
The front air bags help protect the driver
and front passenger by responding to
frontal impacts in which seat belts alone
cannot provide adequate restraint. When
needed, the side air bags help provide
protection in the event of a side impact
or rollover.
•
Air bags are activated (able to inflate
if necessary) when the Engine Start/
Stop button is in the ON position or
approximately within 3 minutes after
ignition off.
• Air bags inflate in the event of certain
frontal or side collisions to help
protect the occupants from serious
physical injury.
• Generally, air bags are designed to
inflate based upon the severity of
a collision, its direction, etc. These
two factors determine whether
the sensors produce an electronic
deployment/inflation signal.
• The front air bags will completely
inflate and deflate in an instant. It is
virtually impossible for you to see the
air bags inflate during an accident. It is
much more likely that you will simply
see the deflated air bags hanging out
of their storage compartments after
the collision.

Ready indicator ........................................................................\
.................................4-17
EV mode indicator ........................................................................\
............................4-17
High Beam Indicator Light ........................................................................\
..............4-18
Light ON Indicator Light ........................................................................\
..................4-18
High Beam Assist indicator light ........................................................................\
.....4-18
Forward Collision-Avoidance Assist Warning Light ...............................................4-18
Lane Keep Assist Indicator Light ........................................................................\
..... 4-18
LCD Display Messages
........................................................................\
.......................4-19
Shift to P to start engine ........................................................................\
..................4-19
Shift to P ........................................................................\
...........................................4-19
Low key battery ........................................................................\
................................4-19
Press brake pedal to start engine ........................................................................\
...4-19
Key not in vehicle ........................................................................\
............................4-19
Key not detected ........................................................................\
..............................4-19
Press START button again ........................................................................\
..............4-19
12V battery discharging due to additional electrical devices ...............................4-19
Press START button with key ........................................................................\
...........4-20
Check BRAKE SWITCH fuse ........................................................................\
............4-20
Press START button while turning wheel ...............................................................4-20
Check steering wheel lock system ........................................................................\
.4-20
Door, Hood, Trunk Open Indicator ........................................................................\
.. 4-20
Sunroof Open
........................................................................\
...................................4-20
Low Pressure ........................................................................\
.....................................4-21
Lights Mode ........................................................................\
....................................... 4-21
Wiper
........................................................................\
.................................................4-21
Low washer fluid ........................................................................\
...............................4-21
Low fuel ........................................................................\
.............................................4-21
Engine has overheated ........................................................................\
.....................4-21
Check exhaust system ........................................................................\
.....................4-22
Check headlight ........................................................................\
...............................4-22
Check turn signal ........................................................................\
.............................4-22
Check brake light ........................................................................\
.............................4-22
Check headlamp LED ........................................................................\
......................4-22
Check Active Air Flap system ........................................................................\
..........4-22
Ready to start driving ........................................................................\
......................4-22
Check regenerative brakes ........................................................................\
.............. 4-22
Stop vehicle and check brakes
........................................................................\
.......4-22
4

Instrument Cluster
4-10
Warning and Indicator Lights
Information
Make sure that all warning lights are OFF
after starting the engine. If any light is still
ON, this indicates a situation that needs
attention.
Air Bag Warning Light
This warning light illuminates:
• When you place the Engine Start/Stop
button to the ON position.
-The air bag warning light illuminates
for about 6 seconds and then turns
off when all checks have been
performed
• The air bag warning light will remain
illuminated if there is a malfunction
with the Safety Restraint System (SRS)
air bag operation.
In this case, have the vehicle
inspected by an authorized HYUNDAI
dealer.
Seat Belt Warning Light
This warning light informs the driver that the seat belt is not fastened.
For more information, refer to “Seat
Belts” in chapter 3.
Parking Brake & Brake Fluid
Warning Light
This warning light illuminates:
• When you place the Engine Start/Stop
button to the ON position.
-The parking brake light illuminates
for about 3 seconds and will then
turn off once the parking brake is
released.
• Whenever the parking brake is
applied.
• Whenever the brake fluid level in the
reservoir is low.
-If the warning light illuminates
with the parking brake released, it
indicates that the brake fluid level in
the reservoir is low.
• Whenever the regenerative brake
does not operate.
If the brake fluid level in the reservoir 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 8). After adding brake fluid,
check all brake components for fluid
leaks. If a brake fluid leak is found, or
if the warning light remains on, or if
the brakes do not operate properly, do
not drive the vehicle. Have the vehicle
inspected by an authorized HYUNDAI
dealer.

04
4-13
Malfunction Indicator Lamp
(MIL)
This warning light illuminates:
• When you place the Engine Start/Stop
button to the ON position.
-The malfunction indicator light
illuminates for about 3 seconds and
then goes off.
• Whenever there is a malfunction with
either the emission control system or
the engine or the vehicle powertrain.
If this occurs, have the vehicle
inspected by an authorized HYUNDAI
dealer.
NOTICE
Driving with the Malfunction Indicator
Lamp (MIL) on may cause damage to
the emission control system which
could affect drivability and/or fuel
economy.
NOTICE
If the Malfunction Indicator Lamp
(MIL) illuminates, potential catalytic
converter damage is possible which
could result in loss of engine power.
In this case, have the vehicle inspected
by an authorized HYUNDAI dealer as
soon as possible.
Charging System Warning
Light
When this warning light illuminates 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.
Have the vehicle inspected by an
authorized HYUNDAI dealer as soon as
possible.
Engine Oil Pressure Warning
Light
This warning light illuminates:
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
information, refer to "Engine Oil" in
chapter 8). If the level is low, add oil
as required.
If the warning light remains on after
adding oil or if oil is not available, have
the vehicle inspected by an authorized
HYUNDAI dealer as soon as possible.

Instrument Cluster
4-14
NOTICE
• If the engine is not turned OFF
immediately after the Engine
Oil Pressure Warning Light is
illuminated, severe damage could
occur.
• If the warning light stays on while the
engine is running, it indicates that
there may be serious engine damage
or malfunction. In this case:
1. Stop the vehicle as soon as it is
safe to do so.
2. Turn off the engine and check the
oil level. If the oil level is low, fill
the engine oil to the proper level.
3. Start the engine again. If the
warning light stays on after the
engine has started, turn the
engine off immediately. In this
case, have the 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.
NOTICE
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.
Service warning light
This warning light illuminates:
• When you set the ignition switch or
the Engine Start/Stop button to the
ON position.
-The service warning light illuminates
for approximately 3 seconds and
then turns off when all checks have
been performed.
• When there is a problem with the
hybrid vehicle control system or
hardware.
When the warning light illuminates
while driving, or does not go OFF after
starting the vehicle, we recommend that
you have the vehicle inspected by an
authorized HYUNDAI dealer.
Exhaust system (GPF)
warning light
• This warning light illuminates, when
accumulated soot reaches a certain
amount.
• When this warning light illuminates, it
may turn off after driving the vehicle
at more than 50mph (80km/h) for
about 30 minutes (above 3rd gear
with 1500 ~ 4000 engine rpm).
If this warning light blinks in spite
of the procedure (at this time LCD
warning message will be displayed),
we recommend that you have the
GPF system checked by an authorized
HYUNDAI dealer.
NOTICE
If you continue to drive with the GPF
warning light blinking for a long time,
the GPF system can be damaged and
fuel consumption can worsen.