The odometer indicates the total distance that the vehicle has been driven and should be used to determine when periodic maintenance should be performed.
Hyundai Kona (OS) 2018-2024 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
...
Hyundai Kona (OS) 2018-2024 Service Manual: Compressor oil Repair procedures
Oil Specification
1.
The HFC-134a system requires synthetic (PAG) compressor oil whereas
the R-12 system requires mineral compressor oil. The two oils must
never be mixed.
2.
Compressor (PAG) oil varies accor ...