2023 HYUNDAI SONATA check engine

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Page 495 of 555

HYUNDAI SONATA 2023  Owners Manual 08
8-25
Checking the Engine Oil and  
Filter
•	Have engine oil and filter changed  
by an authorized HYUNDAI dealer 
according to the Maintenance 
Schedule at the beginning of this 
chapter.
•	 If

Page 496 of 555

HYUNDAI SONATA 2023  Owners Manual Maintenance
8-26
The high-pressure cooling system has a  
reservoir filled with year-round antifreeze 
coolant. The reservoir is filled at the 
factory. 
Check the antifreeze protection and  
coolant

Page 497 of 555

HYUNDAI SONATA 2023  Owners Manual 08
8-27
For mixing percentage, refer to the  
following table:
Ambient 
Temperature Mixture Percentage 
(volume)
Antifreeze Water
-15°C (5°F) 35 65
-25°C (-13°F) 40 60
-35°C (-31°F) 50 50
-45°C

Page 499 of 555

HYUNDAI SONATA 2023  Owners Manual 08
8-29
Checking the Brake Fluid Level
ODN8089005
Check the fluid level in the reservoir  
periodically. The fluid level should be 
between MAX and MIN marks on the side 
of the reservoir. 
Before rem

Page 500 of 555

HYUNDAI SONATA 2023  Owners Manual Maintenance
8-30
Checking the Washer Fluid Level
ODN8089006
Check the fluid level in the washer fluid  
reservoir and add fluid if necessary. Plain 
water may be used if washer fluid is not 
available

Page 507 of 555

HYUNDAI SONATA 2023  Owners Manual 08
8-37
Battery Recharging
 WARNING
Always follow these instructions when  
recharging your vehicle’s battery to 
avoid the risk of SERIOUS INJURY or 
DEATH from explosions or acid burns: •	 Befor

Page 520 of 555

HYUNDAI SONATA 2023  Owners Manual Maintenance
8-50
■ Cartridge type
■ Blade type
■  Multi fuse Normal Blown 
Normal Blown
Normal Blown
OTM078035
A vehicle’s electrical system is protected  
from electrical overload damage by f

Page 521 of 555

HYUNDAI SONATA 2023  Owners Manual 08
8-51
Instrument Panel Fuse  
Replacement
ODN8089015
1.  Turn the engine off. 
2.  Turn all other switches OFF.
3.  Open the fuse panel cover.
4.  Refer to the label on the inside of  
the fuse pane