It's something with your tires bro

 

this triangle light is more of a universal "something's wrong" light

this is just a secondary reminder after you press the info button to make the original warning go away

example:
door is open, hold the INFO button to make it go away, the triangle in the corner is there to remind you "something" is wrong

in your case, it's tire pressure. You might have pressed the INFO button to make the annoying warning go away and get your display back - that triangle is there to remind you without being as annoying