2023 HYUNDAI SONATA check engine

Tires and Wheels .......................................................................................... 8-38
Tire Care .................................................................................................................. 8-38
Recommended Cold Tire Inflation Pressures .......................................................8-38
Check Tire Inflation Pressure ................................................................................. 8-39
Tire Rotation .......................................................................................................... 8-40
Wheel Alignment and Tire Balance ...................................................................... 8-40
Tire Replacement ................................................................................................... 8-41
Wheel Replacement ............................................................................................... 8-42
Tire Traction ............................................................................................................ 8-42
Tire Maintenance.................................................................................................... 8-42
Tire Sidewall Labeling ............................................................................................ 8-42
Tire Terminology and Definitions .......................................................................... 8-45
All Season Tires ....................................................................................................... 8-48
Summer Tires ......................................................................................................... 8-48
Snow Tires...............................................................................................................8-48
Radial-Ply Tires ....................................................................................................... 8-48
Fuses ............................................................................................................ 8-50
Instrument Panel Fuse Replacement ..................................................................... 8-51
Engine Compartment Panel Fuse Replacement ..................................................8-52
Fuse/Relay Panel Description................................................................................ 8-53
Light Bulbs .................................................................................................... 8-58
Headlamp, Parking Lamp, Daytime Running Light, Turn Signal Lamp,
Cornering Lamp and Side Marker ......................................................................... 8-58
Side Repeater Lamp Replacement ....................................................................... 8-59
Rear Combination Light Bulb Replacement .........................................................8-59
High Mounted Stop Lamp Replacement ..............................................................8-61
License Plate Light Bulb Replacement ................................................................. 8-61
Interior Light Bulb Replacement ........................................................................... 8-62
Appearance Care ........................................................................................ 8-64
Exterior Care ........................................................................................................... 8-64
Interior Care ............................................................................................................ 8-68
Emission Control System ............................................................................. 8-70
8

Maintenance
8-6
WARNING
Performing maintenance work on a
vehicle can be dangerous. If you lack
sufficient knowledge and experience or
the proper tools and equipment to do
the work, have it done by an authorized
HYUNDAI dealer.
ALWAYS follow these precautions for
performing maintenance work: • Park your vehicle on level ground,
move the shift button into the P
(Park) position, place the ignition
switch in the LOCK/OFF position.
• Block the tires (front and back) to
prevent the vehicle from moving.
Remove loose clothing or jewelry
that can become entangled in
moving parts.
• If you must run the engine during
maintenance, do so out doors or in
an area with plenty of ventilation.
• Keep flames, sparks, or smoking
materials away from the battery and
fuel-related parts. The following lists are vehicle checks and
inspections that should be performed
by the owner or an authorized HYUNDAI
dealer at the frequencies indicated to
help ensure safe, dependable operation
of your vehicle.
Any adverse conditions should be
brought to the attention of your dealer as soon as possible.
These Owner Maintenance vehicle
checks are generally not covered by
warranties and you may be charged for
labor, parts and lubricants used.
Owner Maintenance Schedule
When you stop for fuel: •
Check the coolant level in the engine
coolant reservoir.
• Check the windshield washer fluid
level.
• Check the for low or under-inflated
tires.
WARNING
Be careful when checking your engine
coolant level when the engine is hot.
This may result in coolant being blown
out of the opening and cause serious
burns and other injuries.
ownEr maintEnanCE

08
8 -7
While operating your vehicle: •
Note any changes in the sound of the
exhaust or any smell of exhaust fumes
in the vehicle.
• Check for vibrations in the steering
wheel. Notice if there is any increased
steering effort or looseness in the
steering wheel, or change in its
straight-ahead position.
• Notice if your vehicle constantly turns
slightly or “pulls” to one side when
traveling on smooth, level road.
• When stopping, listen and check for
unusual sounds, pulling to one side,
increased brake pedal travel or “hard-
to-push” brake pedal.
• If any slipping or changes in the
operation of your transmission occurs,
check the transmission fluid level.
• Check the automatic transmission P
(Park) function.
• Check the parking brake.
• Check for fluid leaks under your
vehicle (water dripping from the air
conditioning system during or after use is normal).
At least monthly: • Check coolant level in the engine
coolant reservoir.
• Check the operation of all exterior
lights, including the brake lights, turn
signals and hazard warning flashers.
• Check the inflation pressures of all
tires including the spare for tires that
are worn, show uneven wear, or are damaged.
• Check for loose wheel lug nuts. At least twice a year:
(i.e., every Spring and Autumn) •
Check radiator, heater and air
conditioning hoses for leaks or damage.
• Check windshield washer spray and
wiper operation. Clean wiper blades
with a clean cloth dampened with
washer a fluid.
• Check headlamp alignment.
• Check muffler, exhaust pipes, shields and clamps.
• Check the seat belts for wear and function.
At least once a year: • Clean body and door drain holes.
• Lubricate door hinges and hood hinges.
• Lubricate door and hood locks and
latches.
• Lubricate door rubber weather strips.
• Lubricate door checker.
• Check the air conditioning system.
• Inspect and lubricate automatic
transmission linkage and controls.
• Clean the battery and terminals.
• Check the brake fluid level.

Maintenance
8-20
Engine Oil and Filter
The engine oil and filter should be
changed at the intervals specified in the
maintenance schedule.
Drive Belts
Inspect all drive belts for evidence
of cuts, cracks, excessive wear or oil
saturation and replace if necessary. Drive
belts should be checked periodically
for proper tension and adjusted as
necessary.
Fuel Filter
A clogged-up fuel filter may limit the
vehicle driving speed, damage the
emission system, and cause the hard
starting. When a considerable amount
of foreign substances are accumulated
in the fuel tank, the fuel filter should be
replaced.
Upon installing a new fuel filter, operate
the engine for several minutes, and
check the connections for any leakages.
Fuel filters should be installed by an
authorized HYUNDAI dealer.
Fuel Lines, Fuel Hoses and Connections
Check the fuel lines, fuel hoses and
connections for leakage and damage.
Have an authorized HYUNDAI dealer
replace any damaged or leaking parts
immediately.
Vapor Hose and Fuel Filler Cap
The vapor hose and fuel filler cap should
be inspected at those intervals specified
in the maintenance schedule. Make sure
a new vapor hose or fuel filler cap is
correctly replaced.
Air Cleaner Filter
A genuine HYUNDAI air cleaner filter
is recommended when the filter is
replaced.
Spark Plugs
Make sure to install new spark plugs of
the correct heat range.
Cooling System
Check cooling system components, such
as radiator, coolant reservoir, hoses and
connections for leakage and damage.
Replace any damaged parts.
ExpLanation of SCHEDULED maintEnanCE itEmS

08
8-21
Engine Coolant
The coolant should be changed at the
intervals specified in the maintenance schedule.
Automatic Transmission Fluid
Automatic Transmission Fluid should
be replaced by an authorized HYUNDAI
dealer at the intervals specified in the
maintenance schedule.
Information
Automatic transmission fluid color is red
when new. As the vehicle is driven, the automatic transmission fluid will begin to look
darker. This is a normal condition and you
should not judge the need to replace the
fluid based upon the changed color.
NOTICE
The use of a non-specified fluid could
result in transmission malfunction
and failure. Use only the specified
automatic transmission fluid (refer
to “Recommended Lubricants and
Capacities” in chapter 2).
Brake Hoses and Lines
Visually check for proper installation,
chafing, cracks, deterioration and any
leakage. Replace any deteriorated or
damaged parts immediately.
Brake Fluid
Check the brake fluid level in the brake
fluid reservoir. The level should be
between the MIN and the MAX marks
on the side of the reservoir. Use only
hydraulic brake fluid conforming to DOT
4 specification.
Parking Brake
Inspect the parking brake system
including the parking brake pedal and cables.
Dual clutch transmission fluid (if equipped)
Inspect the dual clutch transmission fluid
according to the maintenance schedule.
Brake Discs, Pads, Calipers and
Rotors
Check the pads for excessive wear, discs
for run out and wear, and calipers for
fluid leakage.
Exhaust Pipe and Muffler
Visually inspect the exhaust pipes,
muffler and hangers for cracks,
deterioration, or damage. Start
the engine and listen carefully for
any exhaust gas leakage. Tighten
connections or replace parts as
necessary.

Maintenance
8-22
Suspension Mounting Bolts
Check the suspension connections for
looseness or damage. Retighten to the
specified torque.
Steering Gear Box, Linkage &
Boots/Lower Arm Ball Joint
With the vehicle stopped and the engine
off, check for excessive freeplay in the
steering wheel. Check the linkage for
bends or damage. Check the dust boots
and ball joints for deterioration, cracks, or damage.
Replace any damaged parts.
Drive Shafts and Boots
Check the drive shafts, boots and clamps
for cracks, deterioration, or damage.
Replace any damaged parts and, if
necessary, repack the grease.
Air Conditioning Refrigerant
Check the air conditioning lines and
connections for leakage and damage.

08
8-23
Checking the Engine Oil Level
Engine oil is used for lubricating,
cooling, and operating various hydraulic
components in the engine. Engine oil
consumption while driving is normal,
and it is necessary to check and refill the
engine oil regularly. Also, check and refill
the oil level within the recommended
maintenance schedule to prevent
deterioration of oil performance.
Check the engine oil following the below
procedure.
1. Follow all of the oil manufacturer’sprecautions.
2. Be sure the vehicle is on the level
ground in P (Park) with the parking
brake set. If possible, block thewheels.
3. Turn the engine on and allow the engine to reach normal operating
temperature.
4. Turn the engine off and wait about
fifteen minutes for the oil to return tothe oil pan.
5. Pull the dipstick out, wipe it clean, and re-insert it fully.
ODN8089104
„
„Smartstream G1.6 T-GDi
ODN8A080107
„
„Smartstream G2.5 GDi ,Smartstream G2.5 T-GDi
6. Pull the dipstick out again and check the level. The level should be between
F (Full) and L (Low).
EnginE oiL

Maintenance
8-24
„„Smartstream G1.6 T-GDi
ODN8089105
„„Smartstream G2.5 GDi
ODN8089003
„„Smartstream G2.5 T-GDi
ODN8N080002
7. If the oil level is below L, add enough
oil to bring the level to F.
Use only the specified engine oil. (refer
to “Recommended Lubricants and
Capacities” in chapter 2) .
NOTICE
To prevent damage to your engine: • Do not spill engine oil when adding
or changing engine oil. Wipe off
spilled oil immediately.
• The engine oil consumption may
increase while you break in a new
vehicle and it will be stabilized after
driving 6,000 km (4,000 miles).
• The engine oil consumption can be
affected by driving habits, climate
conditions, traffic conditions,
oil quality, etc. Therefore, it is
recommended that you inspect the
engine oil level regularly and refill it
if necessary.
The engine oil consumption may
increase while you break in a new vehicle
and it will be stabilized after driving
6,000 km.
The engine oil consumption can be
affected by driving habits, climate
conditions, traffic conditions, oil quality,
etc. Therefore, it is recommended that
you inspect the engine oil level regularly
and refill it if necessary.
The engine oil change interval is set
for the purpose of preventing oil
deterioration, and is not related the
amount of oil consumption. so, check
and refill the amount of the oil regularly.