P2000 Nox below threshold bank 1

[OggyOggy]

I've seen several posts on this but haven't seen any real resolution. Can anyone point me to some info, preferably self resolved?
2012 Lariat Longhorn 6.7 with 63k miles.

Thanks!

 

[Newsa]

I've seen several posts on this but haven't seen any real resolution. Can anyone point me to some info, preferably self resolved?
2012 Lariat Longhorn 6.7 with 63k miles.

Thanks!

What's your typical driving experuence? Alot of stop and go city driving?

 

[OggyOggy]

Ya, about 75% is around town, the rest is towing a 31ft 5th wheel.

 

[6V92TA]

have you pulled the EGR off and cleaned it? Nox control on a 1st generation emissions system is a combination of EGR and the Nox adsorber catalyst.

 

[Newsa]

have you pulled the EGR off and cleaned it? Nox control on a 1st generation emissions system is a combination of EGR and the Nox adsorber catalyst.

My bet (since his is predef/pre SCR).

EGR valve (&/or cooler)?
Or sensor?

I get the message when I suspect the dpf is full after city driving. Hwy driving makes it go away and turn off the CEL. But since my DEF/SCR is different than his non-DEF, I imagine the cause might be different.

I have wondered if the message is related to increased DEF usage during active regens.
But since his is pre-def, might be the age isn't keeping up during regens?

 

[OggyOggy]

have you pulled the EGR off and cleaned it? Nox control on a 1st generation emissions system is a combination of EGR and the Nox adsorber catalyst.

I haven't yet. The truck is due for the 67,500 mile service where the egr cooler, egr valve, and ccv filter are cleaned or replaced. I'll do that work myself since it's so easy to do.

 

[OggyOggy]

My bet (since his is predef/pre SCR).

EGR valve (&/or cooler)?
Or sensor?
I get the message when I suspect the dpf is full after city driving. Hwy driving makes it go away and turn off the CEL. But since my DEF/SCR is different than his non-DEF, I imagine the cause might be different.

I have wondered if the message is related to increased DEF usage during active regens.
But since his is pre-def, might be the age isn't keeping up during regens?

I see a regeneration every so often, maybe once a week. Does bank 1 indicate a specific sensor or is it more vague?

 

[OggyOggy]

The P2000 never came back. I completed the 67.5 service myself with no issues or problems. Quite simple actually. Motor City Mechanic on youtube has a detailed 4 part video on how to do it.

 

[KurtisWalton]

I did the 67.5K cleaning last year. I just started getting the messegethis week and have noticed my truck goes into Regen daily. I cleaned the airflow sensors and it went away for a day but came back. My truck is a 2011 the year before DEF. I have no idea whats going on.