Ok heres what I have going. I have a 97 ram 5.9 headers no cat , glass packs duels . I have the 1st sensor about 2 1/2 feet before the second. I did the defouler trick on the second 02 . I'm still getting the cel bank 1 sensor 2 thing any ideas . Both 02 sensors are brand new . Last weekend new. Is it possible I got a bad sensor ? Also am I suppose to do the defouler trick on the front one? I was told at auto zone I had 2 pre cat and one after cat sensor.. I called dodge gave them my vin and he said It only can with the 2. Any help ...Thanks Ron

 

The books may show two pre-cat sensors, but, the book also has to account for california emissions......

You only want to do the non-fouler trick on the rear O2 sensor. You WANT the front O2 to get accurate readings.

What brand O2 sensors did you get?

 

Bosh front one ngk back one .. does that make a difference?

 

I wanted ngk front they didnt have it..

 

what CEL code number are you getting ?

different brand o2 sensors should not cause a problem.

 

Yeah, but a slow reacting bosch in front may skew the whole thing......

 

Not to mention the negative battery cable was most likely not disconnected before replacing the o2's.

 

I did remove the neg cable and reset the pcm twice both times the cel came back on .I will have to get it rechecked as I do not remember the code . The guy just told me bank one sensor 2 and that it was running lean. Will running both sensors as bosh help?

 

^probably not.

bank 1, sensor 1 lean would be indicative of a vac leak larger than the pcm's ability to adjust richer.

bank 1, sensor 2 lean (as you report) doesn't make any sense to me.

get the codes and report back. don't let people interpret them.

 

If a rear sensor is not reading in most cases, you get something such as cat efficiency error. Rich or lean is usually related to upstream O2......usually....