The ignition key cannot be removed unless the shift lever is in the P (Park) position.
Hyundai Kona (OS) 2018-2024 Owners Manual: Checking the engine coolant level
Check the condition and connections of all cooling system hoses and heater hoses.
Replace any swollen or deteriorated hoses.
The coolant level should be filled between MAX and MIN (or F (Full) and L (Low))
marks on the side of the coolant reservoir when the engine is cool.
If the coolant level is ...
Hyundai Kona (OS) 2018-2024 Service Manual: Engine Control Module (ECM) Repair procedures
Removal
•
When replacing the ECM, the vehicle equipped with the immobilizer
must be performed procedure as below.
[In the case of installing used ECM]
...