New to Volvo - first issue.

Just picked up a 96 850 5 spd w/128k for my son. From the vin the car is w/out EGR, w/air pump, w/elec control evap, Motronic 4.4 w/Rulo, TLEV (55). Test drove, no check eng light, no codes stored so I bought it. Few days later, bank 1 o2 sensor code (forgot the number) signal low or something like that. Cleared code, it came back and I just said @ 128k, we need sensors. Glad I did not buy them yet. Looking at them, they don't look that old at all. At the connectors, the white wires are still very white. I believe these were changed very recently. That being said, I think I have a wiring or ECU issue.

The scan tool I have is pretty good, Actron CP9580, I can see live data, graphs ect. 1st thing I noticed is I only see data for (1) o2 sensor. The car will not go "closed loop", stays open, actually says "open2".

I saw a few threads similar but looked like they had problems updating from Motronic 4.3 to 4.4.

If anyone has any advice where they would start looking or how they solved a similar issue it would be much appreciated. We have until Feb for inspection to find and fix. From what I have read so far, it will fail emissions in open loop - too rich.

Thank you for any help.