2001 Chrysler PT Cruiser Oil light comes on when I am stop

Computer problem
2001 Chrysler PT Cruiser 4 cyl Automatic 150000 miles

Well This started happening 2 weeks ago, I got my oil pan changed. I've noticed that after i've driven my car for a while, a good 20 mins, when I come to a stop (it doesn't have to be a complete stop I just have to be close to a complete stop), the oil light comes on. However, it goes on and off while i'm at a stop, and goes off completely when I drive. It's pretty annoying to hear the "ding" each time I stop, and while I stop it goes off and goes "ding" again. I've tried driving my car putting in on neutral and letting the car float before I come to a stop, and the light doesn't come on. Can someone please help me.