2023 HYUNDAI SONATA engine

08
8-65
ODN8A089039
NOTICE
• Water washing in the engine
compartment including high
pressure water washing may cause
the failure of electrical circuits
located in the engine compartment.
• Never allow water or other liquids
to come in contact with electrical/
electronic components inside the
vehicle as this may damage them.
NOTICE
Matte paint finish vehicle (if equipped)
Automatic car wash which uses rotating
brushes should not be used as this can
damage the surface of your vehicle. A
steam cleaner which washes the vehicle
surface at high temperature may cause
oil to adhere and leave stains that is
difficult to remove.
Use a soft cloth (e.g. microfiber towel
or sponge) when washing your vehicle
and dry with a microfiber towel. When
you hand wash your vehicle, you should
not use a cleaner that finishes with wax.
If the vehicle surface is too dirty (sand,
dirt, dust, contaminant, etc.), clean the
surface with water before washing the
car.
Waxing
A good coat of wax provides a barrier
between your paint and environmental
contamination.
Keeping a good coat of wax on your
vehicle will help protect it.
Wax the vehicle when water will no
longer bead on the paint.
Always wash and dry the vehicle before
waxing. Use a good quality liquid or
paste wax, and follow the manufacturer’s
instructions. Wax all metal trim to protect
it and to maintain its luster.
Removing oil, tar, and similar materials
with a spot remover will usually strip the
wax from the finish. Be sure to re-wax
these areas even if the rest of the vehicle
does not yet need waxing.
NOTICE
• Wiping dust or dirt off the body with
a dry cloth will scratch the finish.
• Do not use steel wool, abrasive
cleaners, or strong detergents
containing highly alkaline or
caustic agents on chrome-plated or
anodized aluminum parts. This may
result in damage to the protective
coating and cause discoloration or
paint deterioration.
NOTICE
Matte paint finish vehicle (if equipped)
Do not use any polish protector such as
a detergent, an abrasive and a polish.
In case wax is applied, remove the wax
immediately using a silicon remover
and if any tar or tar contaminant is on
the surface use a tar remover to clean.
However, be careful not to apply too
much pressure on the painted area.

08
8-71
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.
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.

Maintenance
8-72
•
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.
Operating precautions for catalytic
converters (if equipped)
WARNING
The exhaust system and catalytic
converter are very hot during and
immediately after the engine has been
running. 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.

I
I-5
E Emission Control System .................................................................................... 8-70
Engine Compartment ..................................................................................... 2-8/ 8-3
Engine Coolant .................................................................................................... 8-26
Changing Engine Coolant ................................................................................ 8-28
Checking the Engine Coolant Level ................................................................. 8-26
Engine Number .................................................................................................... 2-17
Engine Oil ............................................................................................................ 8-23
Checking the Engine Oil and Filter .................................................................. 8-25
Checking the Engine Oil Level ........................................................................ 8-23
Engine Specification ............................................................................................ 2-10
Explanation of Scheduled Maintenance Items ....................................................8-20
Exterior Features .................................................................................................. 5-50
Emergency Trunk Safety Release..................................................................... 5-52
Fuel Filler Door ................................................................................................ 5-56
Hood ................................................................................................................. 5-50
Trunk ................................................................................................................ 5-51
Exterior Overview ................................................................................................. 2-2
F
Forward Collision – Avoidance Assist (FCA) - Sensor Fusion ...........................6-50
FCA Sensor ...................................................................................................... 6-55
FCA Warning Message And Brake Control .....................................................6-52
Forward Collision-Avoidance Assist - Junction Turning ................................6-65
Limitations of The System ............................................................................... 6-58
System Malfunction ......................................................................................... 6-57
System Setting and Activation ......................................................................... 6-50
Forward/Reverse Parking Distance Warning (PDW) ..........................................5-86
Forward/Reverse Parking Distance Warning System Precautions ...................5-90
Non-Operational Conditions of Forward/Reverse Parking Distance
Warning System ............................................................................................. 5-89
Operation of Forward/Reverse Parking Distance Warning System .................5-87
Fuel Requirements ................................................................................................. 1-5
Fuses .................................................................................................................... 8-50
Engine Compartment Panel Fuse Replacement ...............................................8-52
Fuse/Relay Panel Description .......................................................................... 8-53
Instrument Panel Fuse Replacement ................................................................ 8-51

Index
I-6
G Guide to Hyundai Genuine Parts ........................................................................... 1-3
HHead up display (HUD) ....................................................................................... 5-59
Heating and Air Conditioning ............................................................................ 5-106
System Maintenance ...................................................................................... 5-112
System Operation ........................................................................................... 5-111
Highway Driving Assist (HDA) ........................................................................ 6-132
System Setting and Operation ........................................................................ 6-133
Warning Message ........................................................................................... 6-135
How to Use This Manual ....................................................................................... 1-4
Hyundai Auto Canada ........................................................................................... 1-2
IIf the Engine Overheats ......................................................................................... 7-6
If the Engine Will not Start .................................................................................... 7-3
If the Engine Doesn’t Turn Over or Turns Over Slowly ....................................7-3
If the Engine Turns Over Normally but Doesn’t Start .......................................7-3
If you Have a Flat Tire (With Spare Tire) ............................................................7-12
Changing Tires ................................................................................................. 7-13
Jack and Tools .................................................................................................. 7-12
Ignition Switch ...................................................................................................... 6-6
Engine Start/Stop Button ................................................................................... 6-9
Key Ignition Switch .......................................................................................... 6-6
Remote Start ..................................................................................................... 6-12
Important Safety Precautions ................................................................................. 3-2
Air Bag Hazards ................................................................................................. 3-2
Always Wear Your Seat Belt .............................................................................. 3-2
Control Your Speed ............................................................................................ 3-2
Driver Distraction ............................................................................................... 3-2
Keep Your Vehicle in Safe Condition ................................................................. 3-2
Restrain All Children .......................................................................................... 3-2