A Hyundai scan tool can probably figure that out straight away. Quickest solution, find a shop w/that tool.
Other ideas if you don’t want to use the suggested shop route above …
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Double check the air pressures in all four tires, maybe pump up a tires a couple extra pounds beyond the nominal pressure you use to see if that turns the light off.
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And check the air pressure in the compact spare too.
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Try swapping the tires around in various configurations, see if that does anything to help.
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The connection between the tire pressure monitor and the gadget inside the car that reads it is usually by radio frequency. It’s conceivable there some rf transmitter in the area you park or drive your car , or inside the car itself, that is interfering with the signal for some reason. See if this goes away when you drive in other places, park in other places, or turn off your cell phone while in the car, etc.