09 ram 2500 hemi 5.7 230k 4wd
- recently installed header, CAI, cat delete, cleaned injectors installed new filters and orings, new spark plugs, new o2 sensor up and down stream.

Based on the codes and my research it's due to a lean condition on the driver side correct?

On my long tube headers there is a port for the upstream sensor at the end of the collector portion - for both left and right headers. The down stream ports are behind the oil pan for the left side, and let's say 10"-12" past the y pipe on the passenger side.

Stock the O2 sensors are pretty close to the same positions for the right header. However the driver side stock the sensors are almost side by side the passenger side.

So I left the upstream on the driver side where it was at, and welded in a new bung before the y pipe for the down stream sensor. My down stream sensors have a double stacked non fouler installed. Fouler the sensor goes in is drilled out. Bottom fouler has a marble size ball of steel wool pushed into the bottom.

1) should I move my driver upstream o2 sensor to closer to stock position?
2) should I remove the steel wool?
3) lean condition is generally due to an exhaust leak, but could also be an intake leak or misfire - or so I've read. Exhaust/engine is loud. Hard to hear any leaks at idle of there is a small one. I can only get my hand so close to parts of the header/block so I can't tell if there's one there. No other leaks at connecting joints I've found. How else can I detect an exhaust leak in hard/hot to reach places? Smoke would help, but isn't easy with fan stuff going on.
4) lean condition sets due to not enough oxygen in mix. Which doesn't make sense to me. Seems too much oxygen not enough exhaust fumes would be lean. So please explain this to me.
5) how does the upstream and downstream sensors communicate/affect each other?

 

First code is system too lean bank 2. Second code is for the downstream cat on bank 1.

How is your fuel pressure?

 

You're correct on the codes. Looked further into them. Removed wool from b1s2 and b2s2 (downstream sensor) and no p2096. However p0174 says pending after a drive.

Noticed with my scanner that all sensors but the b2s2 read at .7-.8v so within range I believe. B2s2 reads at .055 up to .095,. Then will occasionally bump up to .7 +/-

Not sure on fuel pressure. Scanner just says fuel sys 1 and fuel sys 2 but no reading just CL

 

O2 sensors should bounce between about .1 volt, and .9 volt.... if they are staying fixed, they ain't workin'.

 

None of the sensors are static. All sensor voltages move. The first three move between .7 to .8. Post cat B2S2 is the only one that bounces around .07-.095 mostly, and will bounce up to .7 occasionally. This is at idle.

Watching my live data the b2s2 is low as said, if I idle up a bit it'll go up to .8 and then after a few seconds down to .7 and then .6 then .1 etc.

While driving it will also bounce to .7-.8 from a start or coming to a stop.

 

Also I tried to do a fuel pressure test only to find the couple for the quick disconnect isn't big enough that came with the kit from O'Reilly's.

Though I don't think that's my issue considering it's narrowed down to one sensor.