[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

[bishopts]

Bank 2 sensor 1 is upstream passenger side.
Might want to look really close on the passenger side and see if the harness is laying on the header.

[rjgss]

It wasn't. Funny thing is I changed oil & spark plugs and hadn't started it for a month. Started hard but did start, took it for a good ride and check engine light came on. Car has ran fine with no problems, guess if that's all it is I can't complain in 3 years

[bishopts]

My rear sensors are tuned out and the plugs are sitting there with nothing plugged into them. You can't tune out the front o2 sensors because those are used for fuel management. Technically it can run with no o2 sensors but it will be in a base setting and have no reference to adjust fuel so it will be very sloppy.

You would be surprised how often just clearing the codes and driving the car will correct issues. Basically just letting it clear itself out.