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aus dan Profile
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Date Registered: 06-2011
Location: Melbourne
TOTAL POSTS: 26
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Re: Some DPF Pids for OBDii Scanner


John is right. 4 = burn needed and 3 = burn in progress.

I watched mine the other day and consistently switched from 1 to 4 when my soot hits 38 (I'm not sure why everyone seems to have different soot triggers, maybe the calculations are getting a bit messed)

Once on 4 it didn't start a burn right away (even though I was traveling above 80kmh and the engine was hot) so I assume there is a time thing where all the conditions need to be meet for a particular time before the burn kicks off.

---
Dan X-1949
2011 TS Manual Silver - Provent
9/Mar/2021, 11:51 am Link to this post Send Email PM   Send Private Message Blog
 
Johnnt Profile
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Date Registered: 07-2012
TOTAL POSTS: 29
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Re: Some DPF Pids for OBDii Scanner


quote:

aus dan wrote:

John is right. 4 = burn needed and 3 = burn in progress.

I watched mine the other day and consistently switched from 1 to 4 when my soot hits 38 (I'm not sure why everyone seems to have different soot triggers, maybe the calculations are getting a bit messed)

Once on 4 it didn't start a burn right away (even though I was traveling above 80kmh and the engine was hot) so I assume there is a time thing where all the conditions need to be meet for a particular time before the burn kicks off.



I have been watching the pids and messing about with DPF resets etc for a couple of years now and i'm convinced that there is something going on with Nissan ECMs and dpf soot estimation. I wouldn't surprise me if this is why so many people have problems after a few years rather than blocked DPFs.

The consult III doesn't even seem to display the soot mass PID only the dpf pressure diff which is almost next to useless to give you any real information. The soot mass PID is obviously there and i believe is available from consult III+ so not sure why it has to be so hidden for basic scanners. Bl**dy Nissan emoticon_

J

9/Mar/2021, 9:58 pm Link to this post Send Email PM   Send Private Message Blog
 
lonepolarbear Profile
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Date Registered: 06-2020
Location: Jamboree Heights, QLD
TOTAL POSTS: 17
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Re: Some DPF Pids for OBDii Scanner


From what I've read on other forums and posts for other Renault engines, mode 4 is a passive regeneration. Basically there so much soot that driving it like you stole it will remove some of the soot, this is why the soot goes up and down a bunch in mode 4 and can sometimes passively regenerate enough that it flicks back to mode 1.

I'm having an issue currently where my DPF cycles, soot hits zero and stays there a while but when it finishes the cycle it's back to 20g. Not sure if it's a bad couple cycles or indicative of a deeper issue. I'm keeping a close eye on the next few cycles.

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Darryl - Western Suburbs Brisbane
The TOE truck (registration plate letters)
2009 TS diesel X-trail with added Provent
Centre Upper Dash power mod done
Number plate bracket spotlights.
27/Mar/2021, 9:15 pm Link to this post Send Email PM   Send Private Message Blog
 
Johnnt Profile
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Date Registered: 07-2012
TOTAL POSTS: 29
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Re: Some DPF Pids for OBDii Scanner


Will be interesting to see as i presume unless it gets down to mode 1 then it is probably classed as a failed regen and the failed regen count will be incremented. I think it's this that eventually turns the dpf light on and then the mil light.

j
2/Apr/2021, 10:15 pm Link to this post Send Email PM   Send Private Message Blog
 
lonepolarbear Profile
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Date Registered: 06-2020
Location: Jamboree Heights, QLD
TOTAL POSTS: 17
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Re: Some DPF Pids for OBDii Scanner


@Johnnt it was always getting below 22g on the seemingly failed cycles so it would go back to mode 1, it just wouldn't be long until it as back to mode 4.
Since my last post I've had a few successful cycles, one to 0 and one to 4g so it seems everything is working okay and those weird cycles aren't too much of a concern just yet.

Recently I've started using a diesel additive that's supposed to affect the cetane rating of the fuel and as such it supposedly helps the DPF with burn off and a bunch of other things. I'm not sure if the claims are backed with proof but it wasn't that expensive and worth a try.

---
Darryl - Western Suburbs Brisbane
The TOE truck (registration plate letters)
2009 TS diesel X-trail with added Provent
Centre Upper Dash power mod done
Number plate bracket spotlights.
14/May/2021, 8:42 am Link to this post Send Email PM   Send Private Message Blog
 
Revhead Kev Profile
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Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 5918
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Re: Some DPF Pids for OBDii Scanner


Keep us updated Darryl on your DPF burns. It sounds like the additive may be helping them be more effective.

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Kev X450(c) T30 Guru
03 Titanium Ti T30 Series 1 **MODIFIED**
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14/May/2021, 8:55 am Link to this post Send Email PM   Send Private Message Blog
 


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