Q: Auto transmission on 1991 Mitsubishi Eclipse

Makes no noises, but burns more fuel than normal, doing this

I have the same problem as rickbe32884, please help! My 1995 Isuzu Trooper, Automatic Transmission, 4x4 will not shit unless you shift it manually!! Wayne; wrrhoads82@gmail.com

I went to my car today and when I opened the door, it was beeping. This was before I put the key into the ignition. All of my lights are turned off. It makes the sound as if I had left the keys in the ignition. It only beeps with the driver's door opening. It does not beep when it is closed. I got a warning that I should get my oil changed soon, but that makes a different beeping for about 3 seconds after I've turned on the engine. This beeping is continuous until I close the door. What could be causing this beeping and how could I fix it?