The engine number is stamped on the engine block as shown in the drawing.
Hyundai Kona (OS) 2018-2025 Service Manual: Smart Key Repair procedures
Smart Key
Smart Key Code Saving
1.
Connect the DLC cable of GDS to the data link connector (16 pins) in
driver side crash pad lower panel, turn the power on GDS.
2.
Select the vehicle model and then do "Smart Key Code ...
Hyundai Kona (OS) 2018-2025 Service Manual: Troubleshooting
Troubleshooting
Symptom
Suspect Area
Remedy
Engine will not crank
Battery charge low
Charge or replace battery
Battery cables loose, corroded or worn out
Repair or replace cables
...