brake fluid HYUNDAI SONATA 2023 Owners Manual

2-8
Vehicle Information and Reporting Safety Defects
„„Smartstream G1.6 T-GDi
„„Smartstream G2.5 GDi
The actual engine room in the vehicle may differ from the illustration.ODN8089103/ ODN8N080008L
EnginE ComPartmEnt
1. Engine coolant reservoir ......................8-26
2. Brake fluid reservoir .............................8-29
3. Air cleaner .............................................. 8-31
4. Engine oil dipstick ................................ 8-235. Engine oil filler cap
...............................8-24
6. Windshield washer fluid reservoir .......8-30
7. Fuse box ................................................ 8-56
8. Battery ................................................... 8-36

2-9
02
„„Smartstream G2.5 T-GDI
The actual engine room in the vehicle may differ from the illustration.ODN8N080009L
1. Engine coolant reservoir ......................8-26
2. Brake fluid reservoir .............................8-29
3. Air cleaner .............................................. 8-31
4. Engine oil dipstick ................................ 8-235. Engine oil filler cap
...............................8-23
6. Windshield washer fluid reservoir .......8-30
7. Fuse box ................................................ 8-56
8. Battery ................................................... 8-36

Vehicle Information and Reporting Safety Defects
2-14
rECommEnDED luBriCants anD CaPaCitiEs
To help achieve proper engine and powertrain performance and durability, use only
lubricants of the proper quality. The correct lubricants also help promote engine
efficiency that results in improved fuel economy.
These lubricants and fluids are recommended for use in your vehicle.
Lubricant Volume Classification
Engine oil *1

(drain and refill) Smartstream
G1.6 T-GDi 4.8
ℓ (5.07 US qt.)
SAE 0W-20 / API SN PLUS/SP or
ILSAC GF-6 *2
Smartstream G2.5 GDi 5.8 ℓ (6.13 US qt.)
Smartstream
G2.5 T-GDi 6.13 US qt. (5.8 ℓ)
SAE 0W-30 API SN PLUS /SP or
ILSAC GF-6 *
2
Automatic transmission fluid 6.5 ℓ (6.89 US qt.) MICHANG ATF SP-IV, SK ATF SP IV,
NOCA ATF SP-IV, S-oil ATF SP-IV
HYUNDAI genuine ATF SP-IV
Dual clutch
transmission fluid Gear oil
3.3~3.4 L
(3.49~3.59 U.S.qt) GS WDCTF HD G(GS CALTEX)
Control oil 2.45~2.5 L
(2.59~2.64 U.S.qt) GS WDCTF HD H(GS CALTEX)
Coolant Smartstream
G1.6 T-GDi
8.03 US qt. (7.6 ℓ)
Mixture of antifreeze and distilled
water (Ethylene glycol base coolant
for aluminum radiator)
Smartstream G2.5 GDi
9.07 US qt. (8.59 ℓ)
Smartstream
G2.5 T-GDi 8.59 US qt. (8.13 ℓ)
Brake fluid *2
0.7 ~ 0.8
ℓ
(0.74 ~ 0.85 US qt.) DOT-4
Fuel 60
ℓ (15.85 US gal.)
56 ℓ (14.79 US gal.)
(for ECO package model) Refer to “Fuel requirements” in
chapter 1.
*1 : Refer to the recommended SAE viscosity numbers on page 12.
*2 : Requires < API SN PLUS (or above) Full synthetic> grade engine oil.

04
4-11
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 ignition switch 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 ignition switch 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.
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.

Instrument Cluster
4-12
Dual-diagonal braking system
Your vehicle is equipped with dual-
diagonal braking systems. This means
you still have braking on two wheels even
if one of the dual systems should fail.
With only one of the dual systems
working, more than normal pedal travel
and greater pedal pressure is required to
stop the vehicle.
If the brakes fail while you are driving,
shift to a lower gear for additional engine
braking and stop the vehicle as soon as it
is safe to do so.
WARNING
Parking Brake & Brake Fluid Warning
Light
Driving the vehicle with a warning light
ON is dangerous. If the Parking Brake &
Brake Fluid Warning Light illuminates
with the parking brake released, it
indicates that the brake fluid level is
low.
In this case, have the vehicle inspected
by an authorized HYUNDAI dealer. Anti-lock Brake System (ABS)
Warning Light
This warning light illuminates:
•
When you place the ignition switch to the ON position.
- The ABS warning light illuminates for about 3 seconds and then turns
off.
• Whenever there is a malfunction with the ABS.
Note that the hydraulic braking
system will still be operational even if
there is a malfunction with the ABS.
Electronic Brake Force
Distribution (EBD) System
Warning Light
These two warning lights illuminate at the same time while driving:
When the ABS and regular brake system
may not work normally.
In this case, have the vehicle inspected
by an authorized HYUNDAI dealer.
WARNING
Electronic Brake Force Distribution
(EBD) System Warning Light
When both ABS and Parking Brake &
Brake Fluid Warning Lights are on, the
brake system will not work normally
and you may experience an unexpected
and dangerous situation during sudden
braking.
In this case, avoid high speed driving
and abrupt braking.
Have the vehicle inspected by an
authorized HYUNDAI dealer as soon as possible.

04
4-13
Information - Electronic Brake Force Distribution (EBD)
System Warning Light
When the ABS Warning Light is on
or both ABS and Parking Brake &
Brake Fluid Warning Lights are on, the
speedometer, odometer, or tripmeter may
not work. Also, the EPS Warning Light may illuminate and the steering effort may
increase or decrease. In this case, have the vehicle inspected by
an authorized HYUNDAI dealer as soon as possible.
Electronic Parking Brake
(EPB) Warning Light EPB
This warning light illuminates:
• When you place the Engine Start/Stop
button to the ON position.
- The EPB warning light illuminates for approximately 3 seconds and
then turns off.
• Whenever there is a malfunction with the EPB.
If this occurs, have the vehicle
inspected by an authorized HYUNDAI
dealer.
Information
The Electronic Parking Brake (EPB)
Warning Light may illuminate when
the Electronic Stability control (ESC)
Indicator Light comes on to indicates that
the ESC is not working properly (This does not indicate malfunction of the EPB). AUTO HOLD Indicator Light (if equipped)
This indicator light illuminates:
•
[White] When you activate the auto
hold system by pressing the AUTO
HOLD button.
• [Green] When you stop the vehicle
completely by depressing the brake
pedal with the auto hold system
activated.
• [Yellow] When there is a malfunction
with the auto hold system.
In this case, have the vehicle
inspected by an authorized HYUNDAI
dealer.
For more information, refer to “Auto
Hold” in chapter 6.
Electric Power Steering (EPS)
Warning Light
This warning light illuminates:
• When you place the ignition switch to the ON position.
- The Electric Power Steering Warning
light illuminates for about 3 seconds
and then goes off.
• Whenever there is a malfunction with the EPS.
If this occurs, have the vehicle
inspected by an authorized HYUNDAI
dealer.

05
5-57
Information
If the fuel filler door does not open
because ice has formed around it, tap
lightly or push on the door to break the
ice and release the door. Do not pry on the
door. If necessary, spray around the door
with an approved deicer fluid (do not use
radiator antifreeze) or move the vehicle to a warm place and allow the ice to melt. Closing the fuel filler door
1. To install the fuel tank cap, turn it clockwise until it “clicks” one time.
2. Close the fuel filler door until it is latched securely.
WARNING
Gasoline is highly flammable and
explosive. Failure to follow these
guidelines may result in SERIOUS
INJURY or DEATH: • Read and follow all warnings posted
at the gas station.
• Before refueling, note the location of
the Emergency Gasoline Shut-Off, if
available, at the gas station.
• Before touching the fuel nozzle, you
should eliminate the potential build-
up of static electricity by touching
a metal part of the vehicle, a safe
distance away from the fuel filler
neck, nozzle, or other gas source,
with your bare hand.
• Do not use cellular phones while
refueling. Electric current and/or
electronic interference from cellular
phones can potentially ignite fuel
vapors and cause a fire. •
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.

07
7-21
BasIC trouBleshootIng guIDe
SYMPTOM
PROBABLE CAUSE
Starter won’t function
Engine turns over but will not start
Engine misfires
Engine overheats
Engine stops while driving driving
Fuel consumption is excessive
Brake pedal is spongy
Braking power is insufficient
Steering wheel is heavy
Steering wheel shakes
Steering wheel pulls to one side while driving
Vehicle pulls to one side while braking
Tire wear is abnormal
Charge warning light comes on while driving
Wipers, horn or lights won’t funciton
Battery discharge is excessive
Engine overheating O
Low fuel level O O
Fuel lines clogged O O
Fuel pump defective O O
Strainer clogged O O
Rich mixture O O O Water intrusion into fuel O O O
Coolant leakage OHigh idle speed O
Engine oil insufficient or defective O O
Battery fluid shortage O O
Battery discharged O O O
Battery terminal poor contact O O
Starter or ignition switch malfunction O
Ignition timing incorrect O O O Spark plugs deteriorated O O Spark plugs defective O

Emergency Situations
7-22
SYMPTOM
PROBABLE CAUSE
Starter won’t function
Engine turns over but will not start
Engine misfires
Engine overheats
Engine stops while driving driving
Fuel consumption is excessive
Brake pedal is spongy
Braking power is insufficient
Steering wheel is heavy
Steering wheel shakes
Steering wheel pulls to one side while driving
Vehicle pulls to one side while braking
Tire wear is abnormal
Charge warning light comes on while driving
Wipers, horn or lights won’t funciton
Battery discharge is excessive
Ignition circuit faulty O O Ignition coil or condensor faulty O O O
Distributor faulty O
Alternator belt loose O O O O O Check fuses, bulbs or wiring O
Brake dragging O O
Shift lever not positioned in
"P" or "N" range O
Frequent driving in lower gear O
Air intrusion into brake lines O
Brake fluid insufficient O
Brake disc and pads wet O O
Brake pad wear O O
Wheel alignment incorrect O O O O O O Wheel balance incorrect O O
Tire pressure incorrect
(too low or high) O O O O
Tire size incorrect O

Engine Compartment .................................................................................... 8-3
Maintenance Services ................................................................................... 8-5
Owner’s Responsibility ............................................................................................ 8-5
Owner Maintenance Precautions ............................................................................ 8-5
Owner Maintenance ...................................................................................... 8-6
Owner Maintenance Schedule ................................................................................ 8-6
Scheduled Maintenance Services ................................................................ 8-8
Maintenance Schedule (Smartstream G1.6 T-GDI) ................................................8-8
Maintenance Schedule (Smartstream G2.5 GDI) ..................................................8-12
Maintenance Schedule (Smartstream G2.5 T-GDI) ...............................................8-16
Explanation of Scheduled Maintenance Items ..........................................8-20
Engine Oil ..................................................................................................... 8-23
Checking the Engine Oil Level ............................................................................... 8-23
Checking the Engine Oil and Filter ....................................................................... 8-25
Engine Coolant ............................................................................................. 8-26
Checking the Engine Coolant Level ...................................................................... 8-26
Changing Engine Coolant ...................................................................................... 8-28
Brake Fluid .................................................................................................... 8-29
Checking the Brake Fluid Level ............................................................................. 8-29
Washer Fluid ................................................................................................. 8-30
Checking the Washer Fluid Level .......................................................................... 8-30
Air Cleaner ..................................................................................................... 8-31
Filter Replacement .................................................................................................. 8-31
Climate Control Air Filter ............................................................................. 8-33
Filter Inspection...................................................................................................... 8-33
Filter Replacement ................................................................................................. 8-33
Wiper Blades ................................................................................................ 8-34
Blade Inspection .................................................................................................... 8-34
Blade Replacement ................................................................................................ 8-34
Battery .......................................................................................................... 8-36
For Best Battery Service ........................................................................................ 8-36
Battery Recharging ................................................................................................ 8-37
Reset Features ........................................................................................................ 8-37
8. Maintenance
8