Car was wrecked on left fender.busted computer box and air breather.Replaced but won't start.

The service engine soon light has now come on too.

I did change the mass air flow sensor and both up stream O2 sensors and the light is still on

I have no wiring diagram need to know what the fuse powers up

Something is lodged in there and we need to get to the fan, how do we do that

14,000 miles. Bought a year ago with 5 miles on it. It was a left over. This morning (30 degree) when I started it the motor was knocking very loud! I shut it off. I started it again and it was not as loud and shut it off. I repeated until it stopped. The Service Engine Soon is on too. This scared me!!