Well, the mystery of the code 2-3-2, uneven rpm's at idle, and the MAf in my 95 960 is solved.

The local Volvo dealer wanted to put in two O2 sensors, a new MAF, and other unnecessary service, all of which appeared after they did an oil change. Strange coincidence.

I tested the O2, and it is fine. There is only one O2 on my car. I replaced the MAF with a used one for $150, and when the 2-3-2 persisted, I found a plugged vacuum hole in the throttle body! That was it, and it runs fine.

Word to the wise: mechanics will take you any way they can unless you are well informed and NEVER, EVER, get service done without a second estimate and some research.

What two shops wanted to charge was $1275 and $980 respectively, mostly for parts that my car does not have (2nd O2), was not broken(existing O2), could be found used easily (MAF), and were very easy and simple to fix (throttle body vacuum). Caveat Emptor.