So recently every time I turn on the car there is a beep which I think is normal but when I drive off it makes a beep or basically when I go over over 5 mph it makes a single beep. None of my lights are on just the seat belt but I doubt it's the seat belt because like I said it happened recently.

 

Tire pressure indicator it sounds like

 

sounds like tps as stated

 

Beeping when you go over a certain speed? Clearly it's a bomb.

 

Car is telling you to put gas.