I have a 2015 hyundai i20 and it's going great but for the tp light staying even when all tyres are at correct pressure, anyone else have this problem?

 

You need to have a garage or dealer look at this
They will identify which tpms unit is not working correctly
Then it needs to be replaced
Depending upon where you are and who you go to, it can cost between $75 and $150 (don't quote me)

 

All TPM systems are not necessarily the same. Some need a special tool to reset and others will reset after driving some.

If you are expecting the light to go out after you add air, it may require driving the vehicle some.

 

Getting back to the original problem regarding tire pressures.

There is a wealth of info in your owner's manual that is for your particular vehicle.
Also the recommended tire pressures are located on the door sticker on the drivers side door sticker.

 

Sir, you are a fantastic salesman !

A good salesman can sell a load of fertilizer to a person that doesn't even have a garden.

Could you please tell us what all the explanation has to do with a tire pressure light that won't go out, thanks.