HYUNDAI SONATA HYBRID 2023 Owners Manual

Maintenance
8-62
NOTICE
• Never allow water or other liquids
to come in contact with electrical/
electronic components inside the
vehicle as this may damage them.
• When cleaning leather products
(steering wheel, seats etc.), use
neutral detergents or low alcohol
content solutions. If you use high
alcohol content solutions or acid/
alkaline detergents, the color of the
leather may fade or the surface may
get stripped off.
Cleaning the upholstery and interior
trim
Vehicle interior surfaces (if equipped)
Remove dust and loose dirt from interior
surfaces with a whisk broom or a vacuum
cleaner.
If necessary, clean interior surfaces with
a mixture of warm water and mild non-
detergent cleaner (test all cleaners on a
concealed area before use).
Fabric (if equipped)
Remove dust and loose dirt from
fabric with a whisk broom or vacuum
cleaner. Clean with a mild soap solution
recommended for upholstery or carpets.
Remove fresh spots immediately with
a fabric spot cleaner. If fresh spots do
not receive immediate attention, the
fabric can be stained and its color can be
affected. Also, its fire-resistant properties
can be reduced if the material is not
properly maintained.
NOTICE
Using anything but recommended
cleaners and procedures may affect the
fabric’s appearance and fire-resistant
properties.
Leather (if equipped)
• Features of seat leather
-Leather is made from the outer skin
of an animal, which goes through a
special process to be available for
use. Since it is a natural product,
each part differs in thickness or
density.
Wrinkles may appear as a natural
result of stretching and shrinking
depending on the temperature and
humidity.
-The seat is made of stretchable
fabric to improve comfort.
-The parts contacting the body are
curved and the side supporting
area is high which provides driving
comfort and stability.
-Wrinkles may appear naturally
from usage. It is not a fault of the
products.
NOTICE
• Wrinkles or abrasions which appear
naturally from usage are not covered
by warranty.
• Belts with metallic accessories,
zippers or keys inside the back
pocket may damage the seat fabric.
• Make sure not to wet the seat. It may
change the nature of natural leather.
• Jeans or clothes which could bleach
may contaminate the surface of the
seat covering fabric.

08
8-63
• Caring for the leather seats
-Vacuum the seat periodically to
remove dust and sand on the seat. It
will prevent abrasion or damage of
the leather and maintain its quality.
-Wipe the natural leather seat cover
often with dry or soft cloth.
-Use of proper leather protector may
prevent abrasion of the cover and
helps maintain the color. Be sure to
read the instructions and consult
a specialist when using leather
coating or protective agent.
-Light colored (beige, cream beige)
leather is easily contaminated and
the stain is noticeable. Clean the
seats frequently.
-Avoid wiping with wet cloth. It may
cause the surface to crack.
• Cleaning the leather seats
-Remove all contaminations
instantly. Refer to instructions below
for removal of each contaminant.
-Cosmetic products (sunscreen,
foundation, etc.)
Apply cleansing cream on a cloth
and wipe the contaminated spot.
Wipe off the cream with a wet cloth
and remove water with a dry cloth.
-Beverages (coffee, soft drink, etc.)
Apply a small amount of neutral
detergent and wipe until
contaminations do not smear.
-Oil
Remove oil instantly with
absorbable cloth and wipe with
stain remover used only for natural
leather.
-Chewing gum
Harden the gum with ice and
remove gradually.
Cleaning the seat belt webbing
Clean the belt webbing with any
mild soap solution recommended for
cleaning upholstery or carpet. Follow
the instructions provided with the soap.
Do not bleach or re-dye the webbing
because this may weaken the seat belt.
Cleaning the interior window glass
If the interior glass surfaces of the
vehicle become fogged (that is, covered
with an oily, greasy or waxy film), they
should be cleaned with glass cleaner.
Follow the directions on the glass cleaner
container.
NOTICE
Do not scrape or scratch the inside of
the rear window. This may result in
damage to the rear window defroster
grid.

Maintenance8-64
EMISSION CONTROL SYSTEM
The emission control system of your
vehicle is covered by a written limited
warranty. Please see the warranty
information contained in the Owner’s
Handbook & Warranty Information
booklet in your vehicle.
Your vehicle is equipped with an
emission control system to meet all
applicable emission regulations. There
are three emission control systems, as
follows.
(1) Crankcase emission control system
(2) Evaporative emission control system
(3) Exhaust emission control system
In order to ensure the proper function
of the emission control systems, it
is recommended that you have your
vehicle inspected and maintained
by an authorized HYUNDAI dealer in
accordance with the maintenance
schedule in this manual.
NOTICE
For the Inspection and Maintenance
Test (with Electronic Stability Control
(ESC) system)
• To prevent the vehicle from misfiring
during dynamometer testing, turn
the Electronic Stability Control
(ESC) system off by pressing the ESC
switch (ESC OFF light illuminated).
• After dynamometer testing is
completed, turn the ESC system back
on by pressing the ESC switch again.
1. Crankcase Emission Control
System
The positive crankcase ventilation system
is employed to prevent air pollution
caused by blow-by gases being emitted
from the crankcase. This system supplies
fresh filtered air to the crankcase through
the air intake hose. Inside the crankcase,
the fresh air mixes with blow-by gases,
which then pass through the PCV valve
into the induction system.
2. Evaporative Emission Control
System Including Onboard
Refueling Vapor Recovery
(ORVR)
The Evaporative Emission Control System
is designed to prevent fuel vapors from
escaping into the atmosphere. The
ORVR system is designed to allow the
vapors from the fuel tank to be loaded
into a canister while refueling at the gas
station, preventing the escape of fuel
vapors into the atmosphere.
Canister
Fuel vapors generated inside the fuel
tank are absorbed and stored in the
onboard canister. When the engine is
running, the fuel vapors absorbed in the
canister are drawn into the surge tank
through the purge control solenoid valve.
Purge Control Solenoid Valve (PCSV)
The purge control solenoid valve
is controlled by the Engine Control
Module (ECM); when the engine coolant
temperature is low during idling, the
PCSV closes so that evaporated fuel
is not taken into the engine. After the
engine warms-up during ordinary
driving, the PCSV opens to introduce
evaporated fuel to the engine.

08
8-65
3. Exhaust Emission Control
System
The Exhaust Emission Control System is
a highly effective system which controls
exhaust emissions while maintaining
good vehicle performance.
When the engine starts or fails to start,
excessive attempts to restart the engine
may cause damage to the emission
system.
Engine exhaust (carbon monoxide)
precautions
• Carbon monoxide can be present
with other exhaust fumes. If you smell
exhaust fumes of any kind in your
vehicle, drive with all the windows
fully open. Have your vehicle checked
and repaired immediately.
WARNING
Engine exhaust gases contain carbon
monoxide (CO). Though colorless and
odorless, it is dangerous and could be
lethal if inhaled. Follow the instructions
on this page to avoid CO poisoning.
WARNING
CALIFORNIA PROPOSITION 65
WARNING
Engine exhaust and a wide variety of
automobile components and parts,
including components found in the
interior furnishings in a vehicle, contain
or emit chemicals known to the State
of California to cause cancer and
birth defects and reproductive harm.
In addition, certain fluids contained
in vehicles and certain products of
component wear contain or emit
chemicals known to the State of
California to cause cancer and birth
defects or other reproductive harm.
• Do not operate the engine in confined
or closed areas (such as garages) any
more than what is necessary to move
the vehicle in or out of the area.
• When the vehicle is stopped in an
open area for more than a short time
with the engine running, adjust the
ventilation system (as needed) to draw
outside air into the vehicle.
• Never sit in a parked or stopped
vehicle for any extended time with the
engine running.
• When the engine stalls or fails to
start, excessive attempts to restart
the engine may cause damage to the
emission control system.

Maintenance
8-66
Operating precautions for catalytic
converters (if equipped)
WARNING
The exhaust system and catalytic
system are very hot while the engine is
running or immediately after the engine
is turned off. To avoid SERIOUS INJURY
or DEATH:
• Do not park, idle, or drive the vehicle
over or near flammable objects, such
as grass, vegetation, paper, leaves,
etc. A hot exhaust system can ignite
flammable items under your vehicle.
• Keep away from the exhaust system
and catalytic converter or you may
get burned.
Also, do not remove the heat sink
around the exhaust system, do not
seal the bottom of the vehicle, and
do not coat the vehicle for corrosion
control. It may present a fire risk
under certain conditions.Your vehicle is equipped with a catalytic
converter emission control device.
To prevent damage to the catalytic
converter and to your vehicle, take the
following precautions:
• Use only UNLEADED FUEL for
gasoline engines.
• Do not operate the vehicle when
there are signs of engine malfunction,
such as misfire or a noticeable loss of
performance.
• Do not misuse or abuse the engine.
Examples of misuse are coasting with
the engine off and descending steep
grades in gear with the engine off.
• Do not operate the engine at high
idle speed for extended periods (5
minutes or more).
• Do not modify or tamper with any
part of the engine or emission
control system. All inspections and
adjustments must be made by an
authorized HYUNDAI dealer.
• Avoid driving with extremely low
fuel level. If you run out of gasoline,
it could cause the engine to misfire
and result in excessive loading of the
catalytic converter.

08
8-67
Perchlorate Material-special handling may apply, See:
“https://dtsc.ca.gov/perchlorate”
Notice to California Vehicle Dismantlers:
Perchlorate containing materials, such as air bag inflators, seatbelt pretensioners and
keyless remote entry batteries, must be disposed of according to Title 22 California
Code of Regulations Section 67384.10 (a)
CALIFORNIA PERCHLORATE NOTICE

I
Index
Index

Index
I-2
A
Accessing Your Vehicle
........................................................................\
.................5-5
Hyundai Digital Key
........................................................................\
...............5-12
Immobilizer System
........................................................................\
................5-11
Smart Key ........................................................................\
.................................. 5-5
Air Bag - Advanced Supplemental Restraint System
..........................................3-37
Additional Safety Precautions
........................................................................\
.3-58
Air Bag Warning Labels
........................................................................\
..........3-58
How Does the Air Bag System Operate?
........................................................3-42
Occupant Classification System (OCS)
..........................................................3-47
SRS Care
........................................................................\
.................................3-57
What to Expect After an Air Bag Inflates
.......................................................3-46
Where Are the Air Bags? ........................................................................\
......... 3-39
Why Didn’t My Air Bag Go Off in a Collision?
.............................................3-53
Air Cleaner ........................................................................\
................................... 8-22
Filter Replacement
........................................................................\
..................8-22
Air Conditioning System
........................................................................\
.............2-10
Anti-lock Brake System (ABS)
........................................................................\
...6-28
Electronic Stability Control (ESC) .................................................................. 6-29
Good Braking Practices ........................................................................\
........... 6-33
Hill-Start Assist Control (HAC)
......................................................................6-33
Vehicle Stability Management (VSM)
............................................................6-32
Appearance Care
........................................................................\
..........................8-57
Exterior Care
........................................................................\
...........................8-57
Interior Care
........................................................................\
............................8-61
Automatic Climate Control System
...................................................................5-116
Automatic Heating and Air Conditioning
.....................................................5-117
Manual Temperature Control Mode
..............................................................5-118
System Maintenance
........................................................................\
.............5-126
System Operation
........................................................................\
..................5-124
Automatic Transmission
........................................................................\
..............6-11
Automatic Transmission Operation ................................................................. 6-11
Good Driving Practices
........................................................................\
..........6-16
LCD Display Message
........................................................................\
............6-15
Paddle Shifter(Manual Shift Mode)
................................................................6-17
Parking
........................................................................\
....................................6-14

I
I-3
B
Before Driving
........................................................................\
...............................6-5
Before Entering the Vehicle
........................................................................\
......6-5
Before Starting
........................................................................\
..........................6-5
Blind-Spot Collision-Avoidance Assist (BCA)
...................................................6-66
Blind-Spot Collision-Avoidance Assist Settings
.............................................6-67
Detecting Sensors
........................................................................\
....................6-71
Limitations of Blind-Spot Collision Avoidance Assist
...................................6-74
Warning and Function Control
........................................................................\
6-69
Blind-Spot View Monitor (BVM)
.......................................................................6-94
Brake Fluid
........................................................................\
..................................8-20
Checking the Brake Fluid Level
.....................................................................8-20
Brake System
........................................................................\
...............................6-19
Auto Hold
........................................................................\
................................6-25
Disc Brakes Wear Indicator
........................................................................\
.....6-20
Electronic Parking Brake (EPB)
.....................................................................6-20
Power Brakes
........................................................................\
..........................6-19
Bulb Wattage
........................................................................\
..................................2-8
C
Cabin Air Filter
........................................................................\
............................8-23
Filter Inspection
........................................................................\
......................8-23
Filter Replacement
........................................................................\
..................8-23
California perchlorate notice
........................................................................\
.......8-67
Child Restraint System (CRS)
........................................................................\
.....3-29
Children Always in the Rear
........................................................................\
...3-29
Installing a Child Restraint System (CRS) ......................................................3-31
Selecting a Child Restraint System (CRS)
......................................................3-30
Climate Control Additional Features
.................................................................5-132
Automatic Ventilation
........................................................................\
...........5-132
Smart Seat Warmer/Air Ventilation Seat (Automatic Control Interworking
with the Driver’s Seat System)
.....................................................................5-132
Sunroof Inside Air Recirculation
..................................................................5-132
Washer Fluid Logic
........................................................................\
...............5-132
Coasting guide
........................................................................\
............................6-18
Consumer Information
........................................................................\
.................2-15

Index
I-4
D
Declaration of Conformity
........................................................................\
...........6-78
Front radar
........................................................................\
...............................6-78
Rear corner radar
........................................................................\
.....................6-79
Dimensions
........................................................................\
....................................2-7
Door Locks
........................................................................\
..................................5-28
Automatic Door Lock and Unlock Features
...................................................5-31
Child-Protector Rear Door Locks
...................................................................5-33
Operating Door Locks from Inside the Vehicle
..............................................5-29
Operating Door Locks from Outside the Vehicle
............................................5-28
Rear Occupant Alert (ROA) System
..............................................................5-32
Vehicle Auto-Shut Off Function
......................................................................5-33
Drive Mode Integrated Control System
..............................................................6-34
Drive Mode
........................................................................\
.............................6-34
Drive Mode on Trip Computer
........................................................................\
6-38
Driver Attention Warning (DAW)
.......................................................................6-86
Driver Attention Warning Malfunction and Limitations
.................................6-89
Driver Attention Warning settings
...................................................................6-86
Driver Attention Warning Standby
..................................................................6-89
Leading Vehicle Departure Alert
.....................................................................6-91
Resetting the Driver Attention Warning
..........................................................6-88
Driver Position Memory System
........................................................................\
.5-35
Easy Access Function
........................................................................\
..............5-37
Recalling Positions from Memory
..................................................................5-36
Resetting the Driver’s Seat Memory System
..................................................5-36
Storing Positions into Memory
......................................................................5-35
E
Emission Control System
........................................................................\
............8-64
Crankcase Emission Control System
..............................................................8-64
Evaporative Emission Control System Including Onboard Refueling Vapor
Recovery (ORVR)
........................................................................\
...................8-64
Exhaust Emission Control System
..................................................................8-65
Engine specification ........................................................................\
....................... 2-7
Exterior Overview
........................................................................\
.........................2-2