Power Mode all the time

[spinn360]

I was driving my car yesterday and the power light came on. I wasnt giving it gas in fact I just let off. The light stayed on all the way home. When I drive the car now it is fine for about 5 min. Then the power light comes on and tranny shifts like I am flooring the pedal. It shifts into all 4 gears but doesnt want to shift until about 6500 rpms. Does anyone know whats going on? I just put the for sale signs in the window and I think the car is mad at me. Is there some sensor that tells the tranny when to go into power mode? Or maybe the TCU is bad?? Please help me I can no longer own this car but I cant sell it with problems. Also the awd wasnt working at all in december and now when I take off while turning it feels like it is stuck in 4WD 50/50 I can feel it binding.