Beep while driving 06 Sorento back hatch

What is your question?

Keeps beeping while driving from door being open with no doors are open it's the back hatch door and it stops beeping when I brake. Where is the sensor for the back hatch door I took off the one for the passenger front door already because it was doing the same thing

What makes this problem better or worse?

Only happens while driving /accelerating

How long has your 2006 Kia Sorento had this problem?

Week