2006 Subaru Legacy Help

Hello, I have a 2006 Subaru Legacy with about
75,000 miles on it. My car hates the rain. When
there is a heavy rain it shakes and the check engine
light comes on solid and the cruise control flashes. I
check the error codes and it is always an o2 sensor
but most recently I got codes for
P1518-starter switch circuit low voltage
P0851-park/neutral circuit low voltage
P1152-censor circuit low voltage
P1153-censor circuit high voltage
P0140- o2 censor no activity detected
P1548- ac circuit low voltage
Battery is completely fine, we just checked it. But
yesterday I was trying to reverse and cut the wheel
only to have it stall. When trying to park again hit
stalled twice more. I am going to have the car
towed to a mechanic but does anyone have any
ideas as to what can be wrong? And experience
with a similar Subaru issue? Or any advice on what
I should ask the mechanic/what he should be
looking for? Thank you in advance!