P2096 aev 5.7l

desertrunner

desertrunner

Hooked
Welp the hemi threw a P2096 yesterday. It has been sounding a little bit like an exhaust leak when it first starts up for the day then goes away once warmed up. Gonna have to track it down. Fun times.

Any tips for the p2096 on a 5.7?

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desertrunner said:
Welp the hemi threw a P2096 yesterday. It has been sounding a little bit like an exhaust leak when it first starts up for the day then goes away once warmed up. Gonna have to track it down. Fun times.

Any tips for the p2096 on a 5.7?

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Check your manifolds for cracks. The fact that it’s a lean code and that you say you hear the leak when it’s cold and it goes away when it warms up points me to the manifolds. If they are bad enough it could be sucking in enough air to make the o2 sensor read faulty
 
Bank 1 lean code which could be from the exhaust leak depending on where the leak is. Could also be crappy gas. It is for the o2 sensor downstream of the cat. You can clear the code and see if it returns. I occasionally get a random lean code if I am doing a lot of steep downhill low range first gear stuff. What octane fuel are you using? It is a very common code for lots of Chrysler vehicles. Here’s the blah blah blah version. I would just do the normal check connections clear the light and run 89 or better octane gas. Wouldn’t hurt to find the exhaust leak but if it goes away after warm up it’s probably one of the manifolds where it bolts to the heads. Nothing to freak out about yet.

P2096 DODGE Meaning
The conditions that caused this diagnostic to fail is when the upstream O2 Sensor biased from an exhaust leak, O2 sensor contamination, or some other extreme operating condition. The downstream O2 sensor is considered to be protected from extreme environments by the catalyst. The Powertrain Control Module monitors the downstream O2 sensor feedback control, called downstream fuel trim, to detect any shift in the upstream O2 sensor target voltage from nominal target voltage. The value of the downstream fuel trim is compared with the lean thresholds. Every time the value exceeds the calibrated threshold, a fail timer is incremented and mass flow through the exhaust is accumulated. If the fail timer and accumulated mas flow exceed the fail thresholds, the test fails and the diagnostic stops running for that trip. If the test fail on consecutive trips, the code will set.

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Our Dodge Durango has the 5.7L in it and while it didn't throw any codes it did have an exhaust leak that would go away when it warmed up. Turns out it was a cracked exhaust manifold like coz suggested. Fortunately it was covered under warranty.

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Well full disclosure my wife got gas in it last and when it threw the CEL I immediately thought gas gap. I checked that yesterday and ran it for a minute and the CEL stayed on so figured maybe that wasn't it. Driving around doing errands today the CEL turned off and now no code so.... Idk maybe the gas cap was it. I am gonna do an oil change in the next few days and while I'm in there comb over the manifolds see if I see something. The fact that it goes away not long after driving also makes me think manifolds.
I have been running 87 octane in it since I bought it since that's what I saw over of the AEV forum but maybe I'll switch over to 89.

Anyways CEL is gone for now I'll check the manifolds during my oil change and update if anything changes.

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desertrunner said:
Well full disclosure my wife got gas in it last and when it threw the CEL I immediately thought gas gap. I checked that yesterday and ran it for a minute and the CEL stayed on so figured maybe that wasn't it. Driving around doing errands today the CEL turned off and now no code so.... Idk maybe the gas cap was it. I am gonna do an oil change in the next few days and while I'm in there comb over the manifolds see if I see something. The fact that it goes away not long after driving also makes me think manifolds.
I have been running 87 octane in it since I bought it since that's what I saw over of the AEV forum but maybe I'll switch over to 89.

Anyways CEL is gone for now I'll check the manifolds during my oil change and update if anything changes.

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If it self checked and went out I wouldn’t sweat it much. Gas cap will be a evap code not a lean code. Mine has a slight tick of an exhaust leak on passenger side for about 10 seconds or less and then goes away. Not worth my time yet to pull the heat shields and look. You may see a little mpg increase with better gas if that helps you mentally justify the higher price. [emoji16]


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A.J. said:
If it self checked and went out I wouldn’t sweat it much. Gas cap will be a evap code not a lean code. Mine has a slight tick of an exhaust leak on passenger side for about 10 seconds or less and then goes away. Not worth my time yet to pull the heat shields and look. You may see a little mpg increase with better gas if that helps you mentally justify the higher price. [emoji16]


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As of right now I am not overly concerned and don't plan on throwing money at it. I have a slight tick on the driver's side that to me sounds like exhaust and goes away in about 1-2 minutes. Until the code I had no reason to care and as of right now I'm still not gonna lose sleep over it.

But hey new to me jeep new to engine swap territory so figured it couldn't hurt to throw the question on here and see what other people have experienced before taking any action on it

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Just to close the loop on the "tick" I'm referring to here is the video. Sounds very much like the dry start tick on my 2dr but instead of being gone in 3 seconds it's gone in about 30 seconds. And in the video as shitty as the sounds it you can clearly hear it go away at the end

https://youtu.be/DmJYvLcS2lU

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desertrunner said:
Just to close the loop on the "tick" I'm referring to here is the video. Sounds very much like the dry start tick on my 2dr but instead of being gone in 3 seconds it's gone in about 30 seconds. And in the video as shitty as the sounds it you can clearly hear it go away at the end

https://youtu.be/DmJYvLcS2lU

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Yep sounds just like mine on cold start. Just on the opposite side. Goes away and smooths right out. If I had to guess it’s either a small leak where the manifolds bolt to the heads a cracked manifold or leaking from where the exhaust bolts to the manifold. I’m not going worry about it unless it gets worse.


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Doing a bit more digging and talking to a buddy that's always working on his ram and his guess was a snapped manifold bolt. Which is pretty common with the 5.7s apparently. So went to YouTube and sure enough the videos I watched sounded identical. So the most likely culprit is the rear manifold stud. Still not overly concerned about changing it right away though.

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I have a Dodge Ram with the 5.7 hemi. I’ve had the same noise and manifold bolts sheer on both exhaust manifolds at different times. Before I figured it out/had time to fix it, I put about 15000 miles on it. Probably wasn’t the best thing to do but didn’t really hurt anything either.


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I don't have a great set of extracter bits and I'm about to move so it's not something I am going to address right now. But it's nice to track it down and know what it is

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Well the code was gone for a while and now it's back. P2096 bank 1 lean. I haven't made the time to fix the manifold bolts and check for cracks in the manifold but I guess it's going to me moving up on my priority list :/
 
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