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diesel engine O2 sensor diagnosis

  • tonybushmin
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04 Oct 2019 18:26 #34005 by tonybushmin
diesel engine O2 sensor diagnosis was created by tonybushmin
2012 Dodge 3500 6.7 with P2270 - O2 sensor 1/2 signal biased lean and P22B5 - O2 sensor 1/2 pumping current trim circuit open

From what I gather it seems like an intermittent issue because O2 data on both sensors 1 and 2 lean percentage (8-14%) at WOT, cel comes on sensor 2 is fixed at -0.7% and -0.7% at WOT while sensor 1 reads normal. Turn the key off then back on again and drive and sensor 2 starts reading normally again. Now I'm wondering could this be a bad sensor and if so how can I check it. Not sure if this is the same tests as gasoline vehicles because I hear a lot of talk about NOx sensors and with there being a dpf and afterburner I'm am not so confident in my data.

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04 Oct 2019 22:57 - 04 Oct 2019 22:59 #34013 by ptebo1
Replied by ptebo1 on topic diesel engine O2 sensor diagnosis
I uploaded 2 pdf`s of two chrysler RRT`s ( same thing as a campaign ) If you provide the vin # i can run it through chrysler website and see if the RRT`s apply. Hope this helps a little.

File Attachment:

File Name: 2981.pdf
File Size:1,874 KB

File Attachment:

File Name: recall.pdf
File Size:243 KB
Attachments:
Last edit: 04 Oct 2019 22:59 by ptebo1. Reason: both pdf`s are RRT`s. potential free fix for the customer

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04 Oct 2019 23:15 #34014 by tonybushmin
Replied by tonybushmin on topic diesel engine O2 sensor diagnosis

ptebo1 wrote: I uploaded 2 pdf`s of two chrysler RRT`s ( same thing as a campaign ) If you provide the vin # i can run it through chrysler website and see if the RRT`s apply. Hope this helps a little.

File Attachment:

File Name: 2981.pdf
File Size:1,874 KB

File Attachment:

File Name: recall.pdf
File Size:243 KB


the vin is 3C63D3GL2CG249684

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05 Oct 2019 00:00 #34017 by ptebo1
Replied by ptebo1 on topic diesel engine O2 sensor diagnosis
sorry i am wrong. I just phoned my friend who worked @ chrysler for 18 years. A RRT is sort of the same thing as a campaign, the difference is that the RRT expires with the base warranty. For example it the truck was within the 60 month / 100,000 warranty these RRT`s would have applied regardless if the DTC was set or not. So sort of like a campaign that expires with the warranty. So the bulletins still apply and will probably fix the truck, they are not covered under warranty... @ this point they are simply TSB`s...

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05 Oct 2019 11:38 #34035 by tonybushmin
Replied by tonybushmin on topic diesel engine O2 sensor diagnosis

ptebo1 wrote: sorry i am wrong. I just phoned my friend who worked @ chrysler for 18 years. A RRT is sort of the same thing as a campaign, the difference is that the RRT expires with the base warranty. For example it the truck was within the 60 month / 100,000 warranty these RRT`s would have applied regardless if the DTC was set or not. So sort of like a campaign that expires with the warranty. So the bulletins still apply and will probably fix the truck, they are not covered under warranty... @ this point they are simply TSB`s...


So I believe the 2981 pdf is the one that applies to the issue I'm running into, the truck is out of warranty and I do not work for chrystler so what do I do from an aftermarket standpoint? Is it just saying to repin and rewire the O2 harness with a updated harness?

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