[rjgss]

I just threw a code PO152; bank2 sensor 1 O2 sensor
I bought the car the way it is, headers, no cats and there are O2 sensors installed. Which sensor would this be, I am thinking sensor 1, the tuner had removed which I believe to be sensor 2 and said it wasn't needed (obviously not hooked up, just hanging there). Can I use this sensor to replace the sensor I just removed, it looks different but am thinking I need to buy a direct replacement, just not sure which one that would be. Can't seem to find any info online so any help would be appreciated. Would the tuner have deleted the O2 sensor or just the second ones and if deleted why would it throw a code (plus check engine light). Thanks in advance