89 corolla had a few codes

Hello
I am the new owner of a 1989 toyota corolla with a 4AF engine FWD and it has a 2 brl carb

I have two codes that I need help with.

31 is vacuum sensor

and 41 TPS

Both codes are set I have wiped them out twice and they still come back.

I had a code 71 prior to this and I changed the vacuum modulator and it went away.

Code 31 I can find no mention of a vacuum sensor at any of my local parts places.

I know that my engine does not have a TPS so what can it be?

Any help is appreciated

Dean