2021 HYUNDAI SONATA LIMITED check engine

Convenient Features
5-4
Remote Key (if equipped)
OIG046001
Your HYUNDAI uses a remote key, which
you can use to lock or unlock the driver
and passenger doors or the rear trunk.
(1)
Door L
ock
(2)

Door Unlock
(3

)
T
runk Unlock
(4)
P

anic
Locking your vehicle
To lock your vehicle:
1.
Mak
e sure all doors, the engine hood
and the trunk are closed.
2.

Pr
ess the Door Lock button (1) on the
remote key to lock all doors.
3.

If the Door L
ock button (1) is pressed
once more within four seconds, the
horn will beep once and the hazard
warning lights will blink.
4.
Mak

e sure the doors are locked by
checking the position of the door lock
button inside the vehicle.
WARNING
Do not leave the keys in your
vehicle with unsupervised children.
Unattended children could place the
key in the ignition switch and may
operate power windows or other
controls, or even make the vehicle
move, which could result in serious
injury or death.
Unlocking your vehicle
To unlock your vehicle:
1.

Pr
ess the Door Unlock button (2) on
the remote key.
2.

The driv
er’s door will unlock. The
hazard warning lights will blink two
times.
• Two press unlock setting:
If you press the Door Unlock button
on the remote key again within
four seconds, then all the doors will
unlock.
Two press unlock setting can be
changed according to owner’s
preference in the cluster User Settings
mode or with the remote key.
• User settings mode method:
Select or deselect the ‘Two Press
Unlock’ feature in the User Settings
mode on the cluster LCD display (User
Settings
→ Door → Two Press Unlock).
Information
After unlocking the doors, the doors will
automatically relock after 30 seconds
unless a door is opened.
Accessing Your Vehicle

05
5-21
Remote Start with Digital Key
• When the shift button of your vehicle
is in P (Park) and all of the doors
including trunk and hood is locked
and the vehicle is off, press the Door
Lock button in the Hyundai Digital
Key app then press the Remote Start
button within 4 seconds.
You can confirm the engine is on if the
hazard warning lights blinks two times
and the chime sounds.
• If you want to turn off the engine,
press Remote Engine Stop. Air
Conditioner / Heating system
maintains the same status as when
you last used the vehicle.
• Unless you put the registered digital
key(smartphone) on the interior
authentication pad (wireless charger)
when the remote start function is on,
the engine will turn off.
• If you do not get on the vehicle within
10 minutes after the engine turns on,
the vehicle will turn off.
For more information, refer to the Engine
Start/Stop button in chapter 6.
Vehicle information Display
The digital key application displays
the vehicle information such as
driving or door conditions through the
communication with the vehicle.
• How to check : Select the vehicle
what you want to check and touch
the vehicle image, then vehicle
information display page will be
shown.
• Contents : accumulated odometer,
latest fuel economy, driving range,
fuel remaining, tire pressure, doors
lock/unlock status and last data
updated time.
ÃDispla

yed vehicle date could be
differed from the current vehicle
condition.
à F

or more information, please refer to
the ‘Tutorial’ on your Digital key app. Smartphone change/App deletion
If you change your smartphone or delete
the Hyundai Digital Key App, please refer
to the following to set up your Digital
Key:
Smartphone Change/ Reset
If you change or reset the smartphone,
the registered digital key in your previous
smartphone may not be used. Please
refer to following procedure to use the
digital key.
1.

Ins
tall the digital key application and
log in.
2.

If y
ou are the owner, retry the Digital
key save process.
3.

If y
ou are the sharer, need to re-share
the key from owner.
App delete & reinstall/ Delete App data
You can re-download the digital key
from server in these cases as follow
procedure.
1.

R
einstall the application and log in.
2.

Input the PIN number f
or user
verification.
3.

If PIN is corr
ect, digital key data
will be re-downloaded to your
smartphone and you can use it
without any further registration or
sharing.
Smartphone operability with Digital Key
The digital key application may not
be available to old type smartphones.
Please check the available smartphone
models with your dealer. NFC antenna
position on the smartphone can be
confirmed on each smartphone’s manual
or contact to customer service center of
the smartphone manufacture.

Convenient Features
5-36
Rear Occupant Alert (ROA)
System
The Rear Occupant Alert (ROA) system
is provided to help prevent exiting the
vehicle with the rear passenger left in the
vehicle. When you open the front door
after opening and closing the rear door
and turning off the engine, the “Check
rear seats” warning message appears on
the cluster.
„„Cluster
ODN8A059339
„„Steering wheel
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CAUTION
• The system does not actually detect
objects or people in the rear seat. By
using a rear door opened and closed
history, the system indicates that
there may be something in the rear
seat.
• The rear door opened and closed
history can be initialized only when
you turn off the engine normally, get
off the vehicle and lock the door with
the remote control key. Therefore,
there could be alarms even though
the back doors are locked.
e

x) When you get in and drive your
vehicle without locking the doors after
the alarm sounds, there could be the
alarm sounds if you turn off the engine
and open the driver’s seat door.

05
5-37
WARNING
It does not use the actual sensors but it
provides the alarm sounds by checking
the rear door lock/unlock status as a
reminder.
Vehicle Auto-Shut Off Function
If your parked vehicle in a garage is on
for a period of time, the engine turns
off automatically to prevent carbon
monoxide poisoning.
System setting
Select ‘User Settings → Convenience → Vehicle Auto-Shut Off’ in the LCD display.
ODN8A059340
Operating conditions
Vehicle Auto-Shut Off timer activates
when the following conditions are met.
• Ignition [ON] or engine running
• Shift button is in P (Park) position
• Unfastened driver’s seat belt
• Even one of the doors opens
Deactivations
• In case of selecting “Disable” for
Vehicle Auto-Shut Off in the User
Settings mode (30 min. based timer is
reset automatically if you restart.)
• Gear shift other than P
• Fastened driver’s seat belt
• Step on the brake or accelerator
System operation
At the set time on Vehicle Auto-Shut Off
timer, the engine turns off automatically.

Convenient Features5-38
ThefT-AlArm SyS T em
This system helps to protect your vehicle
and valuables. The horn will sound and
the hazard warning lights will blink
continuously if any of the following
occur:
- A door is opened without using the
r

emote key or smart key.
- The trunk is opened without using the r

emote key or smart key.
- The engine hood is opened.
The alarm con

tinues for 30 seconds, then
the system resets. To turn off the alarm,
unlock the doors with the remote key or
smart key.
The Theft Alarm System automatically
sets 30 seconds after you lock the doors
and the trunk. For the system to activate,
you must lock the doors and the trunk
from outside the vehicle with the remote
key or smart key or by pressing the
button on the outside of the door handle
with the smart key in your possession.
The hazard warning lights will blink and
the chime will sound once to indicate the
system is armed.
Once the security system is set, opening
any door, the trunk, or the hood without
using the remote key or smart key will
cause the alarm to activate.
The Theft Alarm System will not set if the
hood, the trunk, or any door is not fully
closed. If the system will not set, check
the hood, the trunk, or the doors are fully
closed.
Do not attempt to alter this system or
add other devices to it. Information
• Do not lock the doors until all
passengers have left the vehicle. If the
remaining passenger leaves the vehicle
when the system is armed, the alarm
will be activated.
• If the vehicle is not disarmed with the
remote key or smart key, open the
doors by using the mechanical key
and place the ignition switch in the
ON position (for remote key) or start
the engine (for smart key) by directly
pressing the ignition switch with the
smart key.
• If the system is disarmed by unlocking
the vehicle, but neither a door or the
trunk is opened within 30 seconds, the
doors will relock and the system will
rearm automatically.

Convenient Features5-64
exterior FeAtures
Hood
Opening the hood
ODN8A059040
1. Park the vehicle and set the parking brake.
2.

Pull the r
elease lever to unlatch the
hood. The hood should pop open
slightly.
ODN8A059041
3. Go to the front of the vehicle, raise the hood slightly, push up the secondary
latch (1) inside of the hood center
and lift the hood (2). After it has been
raised about halfway, it will raise
completely by itself.
Closing the hood
1. Before closing the hood, check in and around the engine compartment to
ensure the following:
- An

y tools or other loose objects are
removed from the engine room area
or hood opening area
- All glo

ve, rags, or other combustible
material is removed from the engine
compartment
- All filler caps ar

e tightly and
correctly installed
2.

L
ower the hood halfway (lifted
approximately 12 inches (30 cm) from
the closed position) and push down
to securely lock in place. Then double
check to be sure the hood is secure.
If the hood can be raised slightly, it is
not securely locked. Open it again and
close it with more force.
WARNING
• Before closing the hood, ensure
all obstructions are removed from
around the hood opening.
• Always double check to be sure that
the hood is firmly latched before
driving away. Check there is no
hood open warning light or message
displayed on the instrument cluster.
Driving with the hood opened may
cause a total loss of visibility, which
might result in an accident.
• Do not move the vehicle with the
hood in the raised position, as vision
is obstructed, which might result in
an accident, and the hood could fall
or be damaged.

05
5-71
• Do not get back into a vehicle
once you have begun refueling.
You can generate a buildup of
static electricity by touching,
rubbing or sliding against any item
or fabric capable of producing
static electricity. Static electricity
discharge can ignite fuel vapors
causing a fire. If you must re-enter
the vehicle, you should once again
eliminate potentially dangerous
static electricity discharge by
touching a metal part of the vehicle,
away from the fuel filler neck, nozzle
or other gasoline source, with your
bare hand.
• When using an approved portable
fuel container, be sure to place the
container on the ground prior to
refueling. Static electricity discharge
from the container can ignite fuel
vapors causing a fire.
Once refueling has begun, contact
between your bare hand and the
vehicle should be maintained until
the filling is complete.
• Use only approved portable plastic
fuel containers designed to carry and
store gasoline.
• When refueling, always move the
shift button to the P (Park) position,
set the parking brake, and place
the ignition switch to the LOCK/
OFF position. Sparks produced by
electrical components related to the
engine can ignite fuel vapors causing
a fire.
• Do not use matches or a lighter and
do not smoke or leave a lit cigarette
in your vehicle while at a gas station,
especially during refueling.
• Do not over-fill or top-off your
vehicle tank, which can cause
gasoline spillage.• If a fire breaks out during refueling,
leave the vicinity of the vehicle, and
immediately contact the manager
of the gas station and then contact
the local fire department. Follow any
safety instructions they provide.
• If pressurized fuel sprays out, it can
cover your clothes or skin and thus
subject you to the risk of fire and
burns. Always remove the fuel cap
carefully and slowly. If the cap is
venting fuel or if you hear a hissing
sound, wait until the condition stops
before completely removing the cap.
• Always check that the fuel cap is
installed securely to prevent fuel
spillage in the event of an accident.
Information
Make sure to refuel your vehicle according
to the “Fuel Requirements” suggested in
the Introduction chapter.
NOTICE
• Do not spill fuel on the exterior
surfaces of the vehicle. Any type of
fuel spilled on painted surfaces may
damage the paint.
• If the fuel filler cap requires
replacement, use only a genuine
HYUNDAI cap or the equivalent
specified for your vehicle. An
incorrect fuel filler cap can result
in a serious malfunction of the fuel
system or emission control system.

05
5-85
Information
If the wiper switch is set in AUTO mode
when Engine Start/Stop button is in the
ON position, the wiper will operate once to
perform a self-check of the system. Set the
wiper to the OFF position when the wiper
is not in use.
WARNING
To avoid personal injury from the
windshield wipers, when the engine
is running and the windshield wiper
switch is placed in the AUTO mode:
•
Do no
t touch the upper end of the
windshield glass facing the rain
sensor.
•

Do no
t wipe the upper end of the
windshield glass with a damp or wet
cloth.
•

Do no
t put pressure on the
windshield glass.

Windshield Washers
ODN8059209K
In the OFF position, pull the lever gently
toward you to spray washer fluid on the
windshield and to run the wipers 1-3
cycles. The spray and wiper operation
will continue until you release the lever. If
the washer does not work, you may need
to add washer fluid to the washer fluid
reservoir.
WARNING
When the outside temperature is below
freezing, ALWAYS warm the windshield
using the defroster to help prevent
the washer fluid from freezing on the
windshield and obscuring your vision
which could result in an accident and
serious injury or death.
NOTICE
• To prevent possible damage to the
washer pump, do not operate the
washer when the fluid reservoir is
empty.
• To prevent possible damage to the
wipers or windshield, do not operate
the wipers when the windshield is
dry.
• To prevent damage to the wiper
arms and other components, do
not attempt to move the wipers
manually.
• To prevent possible damage to the
wipers and washer system, use anti-
freezing washer fluids in the winter
season or cold weather.