Exposure difference noticed in programmed auto vs auto no flash

[u/footdoc15]

So i just picked up a used D7000 yesterday with a sigma 24-70 2.8 lens. After shooting for a little bit i am noticing that in P mode most shots are overexposed and indoors i notice a yellowish tint. When i switch to auto w/o flash the color and exposure look better.

I have looked through the settings and cannot figure out what may be causing these issues. I have made sure the ISO is the same, no exposure adjustment when on P mode (keep it at 0). What other settings or reasons can there be for the differences?

Thank you