Trying to see what sensor this is. I understand bank 1 is cyl 1 side and bank 2 is the other, but where is this bank 1 sensor 3? i didn't see one behind my cat (I also don't have a cat...) only one right before it, but then again it's been a while since I've looked under the vehicle. Whatever sensor it is it's stuck at 1.049v so I know it needs to be replaced, I just want to make sure I don't pull and replace the wrong one or buy the wrong sensor.

any help would be appreciated!

 

you should only have 3 o2s 2 pre-cat and 1 post if you dont have a cat it will throw a code for the post cat o2

 

The 3rd o2 sensor I found is BEFORE the cat, the code is high voltage and my scan tool shows it pegged at 1.085 so I know it's just shorted out somewhere.

Do other v6's have this o2 after the cat? I can plainly see where I replaced the cat with a piece of pipe, and the o2 sensor is before the cat. This is a 96 3.8 RS with the y87 package, so the only difference between it and a normal v6 is the muffler in the back.

 

the purpose of the last o2 is to read how well the cat is working. i might be wrong (im not familiar with the RWD 3800 motor at all) so it might have one before and after.

 

The 96 has 4 O2 sensors. This pic shows a Y-pipe off the car and the location of the pre-cat O2 sensor