I just had ARH long tubes and catted Y pipe installed on Tuesday and now I'm getting these codes on my 2005 Ram 2500 5.7L
The wiring is fine, the sensors are all new as of about 1000km ago and I can't see any signs of a leak anywhere around the Y pipe or sensors.
anything else I should be looking for? what else can cause these codes?

 

Are the sensor further down the pipe than they were with the previous manifolds?

 

They're a little further away, but not a lot

 

Wonder if wrapping the headers would solve it......

Did you reset the PCM after installing the headers? Wonder if the PCM would relearn the new situation.

 

The headers aren't wrapped, I was advised against doing that by Nick himself at ARH. He said over time it could cause the metal to become brittle and could cause cracking....so they went in unwrapped.

the PCM was reset, I'm pretty sure the battery was disconnected because I had catalyst efficiency codes when I rolled in, and no codes when I rolled out.

At this point I think I'm leaning towards it being because the upstream O2s were moved somewhat from the factory location.
Anything else that causes these codes doesn't appear to be happening on my truck.

No leaks that I can determine near the sensors, the wiring is all fine and not damaged.

I'm kind of also wondering if it's because only 2 extension harnesses were used instead of all 4.

 

Not sure if the extension harnesses would make any difference...... My theory is, with the sensor being further 'down the pipe', the PCM is changing fuel ratio, but, not seeing a change at the O2 sensor as quickly as it thinks it should..... Or something similar to that. No clue how to address that one. Is the other guy that got the headers having the same issue?

 

I think he mentioned in that thread that he does have some kind of CEL, but I don't recall if he specified.

I think probably the only thing I could do is get a tune for it if there's no other way to "fix" it, to change the timing. That's part of the reason why I was wondering if not using the harnesses would cause any issue. The wires being longer will cause a very tiny delay in the signal since it has that little bit of extra wire added.

The time difference between where the sensor was, and where it is now would be absolutely minuscule though, like mere fractions of a fraction of a second kind of thing.

I'm also wondering if the temperature of the exhaust gasses has anything to do with it in anyway. The headers being thinner and exposed to the air could cool the gasses slightly before they reach the O2, though I'm not really sure if that would affect anything or if the cooling effect would be significant enough.

I'm just not sure how this code relates to the rear O2s since those are the ones with the harnesses I think.....so does it detect that the change isn't happening fast enough because the rear O2s send the signal, or is it solely based on the front O2s only?

 

Rear O2 sensors are there to monitor catalyst efficiency, that's it. They have no affect on the front O2 sensors. Also, the sensors are heated...... so, exhaust temp *shouldn't* matter.

What brand sensors are in there now? Are they the originals, or did you install new ones?

 

I installed new ones about 1000km ago or less. I believe they're NTK sensors.

 

Well, that's the right brand at least...... If you reset the PCM, how long before the codes come back?