1995 850 sedan automatic with 186000 miles.

I have some trouble codes i could use help with.

First does anyone have info as to what all the underhood diagnosis ports on 95 and older are for, both A side and B side?
My codes are:

port A1) 3-1-3

A2)1-1-1

A3) 1-4-1 , 2-1-3 , 2-1-4 , 4-1-2 , 4-1-3 , 4-1-4 , 4-2-1 , 4-2-2

B2)1-2-2

B5)2-4-4 , 2-4-2

I have recently replaced both oxygen sensors last fall. Plugs, rotor cap and wires, New MAF, air filter, had the fuel injectors cleaned and new o-rings and seals for them all this week. The pcv system was replaced about 1 year ago.

The car seems to run very well with the most recent work but the check engine light and SRS light are both on. I tried dis-connecting the battery to reset the lights but they come right on after restarting the car every time.
I think i have made some progres but need some guidence for the rest. I think some of the brake codes may be from rust on the abs sensor magnets since my winter wheels are very rusty. (but they work)

Thanks,Bobd