Question: P2202 P2203 NOx Sensor Replacement Is a NOx sensor reset required? - Diesel Place : Chevrolet and GMC Diesel Truck Forums
 
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Duramax Fifth Generation: 2011-2016 (LML) Discuss the fifth generation (2011-2016) of the 6.6L Duramax diesel engine & associated components. Engine related discussion ONLY.

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Old 02-10-2019, 05:48 AM   #1 (permalink)
Tirogers
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P2202 P2203 NOx Sensor Replacement Is a NOx sensor reset required?

Hey guys, 1st post. 2012 LML with 192,xxx miles, so it's out of all warranties. I am throwing a P2202 and P2203 without the MIL / CEL actually illuminating, and no reduced speed warning on the DIC. I can clear the code with my Edge, but next drive cycle it returns after 20ish minutes. I have ordered the OEM AC Delco 12671387 NOx Sensor 1 (the one in the engine bay).

Can anyone tell me if it is actually 100% necessary to "Perform the scan tool NOx Sensor 1 Reset procedure "

My Snap-on Solus Edge has 2015(ish) software and I can not perform that function unless I spend $1000 to update the software.

I bought the truck @ 149,xxx miles Nov 2018 and it was 100% dealer maintained with all service records. I would assume all ECU updates have been done although I see no mention of it in the 30+ page GM service summary report I recieved.


Thanks guys!


Last edited by OkDually; 02-10-2019 at 08:01 AM. Reason: prefix
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Old 02-10-2019, 10:36 AM   #2 (permalink)
Rvn4me
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Yes... There is a "nitrogen oxide sensor reset procedure" that needs to be performed when replacing the sensor.

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Old 02-12-2019, 10:36 PM   #3 (permalink)
Tirogers
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UPDATE: Truck was throwing p2201 p2202 2203 p12b6 p2bad I replaced NOx sensor 1 with ACDelco 12671387 and all is well! NOx sensor 1 is under the hood on the turbo outlet. I also reset NOx sensor 1 on a Snap On scanner (Solus Ultra) with 17.4 software , Snap-On scanner software 17.2 and above can do it.... Hint: look under the engine menu. I'm not sure this reset is entirely necessary but I had access to a scanner and would rather not risk it. These codes were NOT thrown all at the same time. The following was over about 400 miles. First code was p2202 ... I cleared it .... then p2203 appeared but not p2202 within 10 miles. I cleared it....then threw p12b6 eventually. I cleared p12b6 and it then threw p2203. I cleated that and it eventually threw p12b6 p2202 p2203 over and over but mostly not all at the same time. I replaced NOx sensor # 1 and all seems to be well. FYI the ONLY code to actually make the dash check engine light go on was the p2bad , the other codes must have kept appearing as "pending". I used my Edge CS2 to read, clear, and monitor codes. The p12b6 was and still is concerning but seems to have been resolved with the replacement of NOx sensor 1. Should I be concerned with this code? Sorry for the ramble but I hope to help someone else with my experience.
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Old 02-13-2019, 08:37 AM   #4 (permalink)
Rvn4me
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P12B6
https://www.dieselplace.com/forum/63...dtc-p12b6.html

Dealer will have Diagnostic Instructions for this code.
Engine Engine Controls and Fuel - 6.6L (LGH or LML) Diagnostic Information and Procedures
DTC P12B4, P12B6, P12B8, P12BA, P12BC, P12BE, P12C0, or P12C2

Last edited by Rvn4me; 02-13-2019 at 08:46 AM.
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