Solved, found that the heating element for the o2 was not getting power. I looked at the fuse but never had checked for power at the fuse as I figured I would have a no run/start situation since the fuel pump is on the same fuse. Turns out the fuel pump relay was not function but I was still able to...

So my car is a 1991 volvo 245 with M47 transmission. It has LH3.1 and recently It started throwing a 2-1-2 code even though I had recently replaced the O2 sensor. I just replaced it with a non-generic one and I am still getting the 2-1-2 code after driving a mile or 2. I looked at the o2 with the en...