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bank 1 sensor 2, there is one o2 sensor on each side of engine where headers come out. and one behind where the cats would be. The people at autozone said it is the pre cat 02 sensor on the passenger side of engine. Which I have replaced with a new 02 sensor, however I still have the code. So I went to another autozone and they told me it is the driver side pre cat 02 sensor. I just need to confirm that replacing the 02 sensor should get rid of the code. So could you please confirm which o2 sensor that would be on my 1996 f150 w/ 351w.
Well Im, trying to remember but I think #1cyl in on the right bank. So that would make that bank 1. If #1 is on the right side, and the code is for bank 1 sensor 2, that would make it the post cat sensor, on the passenger side.