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Johnnt Profile
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Date Registered: 07-2012
TOTAL POSTS: 29
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Some DPF Pids for OBDii Scanner


So after a loooong search i managed to find a couple of custom PIDs that will tell you whether your DPF is full and when a regeneration is taking place. I'm not 100 sure of the scale values but they worked for me such that the Soot level increased, the exhaust temp when up to 600deg and the DPF mode changed from 4 to 3 then back once it had finished.


Name DispName MIDPID Equation Min Max Unit Header Inteval Scale
DPFSootMass Soot 22242C (A*256+B)/100 0 60 g 7 3 1
DPFInletTemperature1 DPF.In1 222441 ((A*256+B)-2730)/10 -20 700 C 7 2 1
DPFInletTemperature2 DPF.In2 222442 ((A*256+B)-2730)/10 -20 700 C 7 3 1
DPFOperatingMode DPFOpMode 222056 A 0 10 7 3 1


Last edited by Johnnt, 7/Jul/2019, 12:29 pm
7/Jul/2019, 8:46 am Link to this post Send Email PM   Send Private Message Blog
 
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


Thanks for the info. It's long been a question of what and how to measure the DFP's.

Good work.

---
Dan X-1949
2011 TS Manual Silver - Provent
8/Jul/2019, 8:46 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


I missed one out from the list, there is also DPF Exhaust Flow Rate:

Pid: 222447
Min:0
Max:100
Unit L/hr
equation: (A*256+B)/10
Diag start, stop 0,1

I am using header 7e0 for all these in my Xtrail.

I would love to have DPF Pressure but all the ones I have don't seem to work. Not the end of the world though as the soot value gave me enough info to know when to take it for a drive to regen.

Cheers
J
8/Jul/2019, 1:16 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:


Hey Johnnt,
Just picked up myself a 2009 TS last weekend and I wanted to copy what you're doing to keep an eye on my DPF.
Got the jaycar OBDii and I'm starting the PID programming in Torque Pro.

I've tried to put the above PID settings into a table to keep them neat, hoping you can just confirm for me if any of the empty boxes need to be filled? There's no start/stop for any but the last PID and no interval or scale for the DPF exhaust flow rate?

From what I've seen the header specifically needs to be "7e0" not just "7" like the original post shows?

Image
Link in case the above image doesn't work

---
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.
9/Jun/2020, 9:08 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: Re:


Sorry i hadn't seen you reply - not been using the board much as it has gone pretty much to sleep for the T31 also i am just nursing mine until it eventually dies. It's got 300k on the clock so not sure how long these engines are good for.

I presume you got all these PIDs working?

I would be interested in knowing whether your DPF mode stays at 1 much of the time and what your SPF soot mass goes to once a normal regen has been performed.

I changed my DPF a few years ago for an aftermarket one and i think there is a mismatch with the car. Even after a full regen i can never get the soot mass below about 10gms. This does trigger the dpf mode to hit 1 but then changes back to 4 once it goes beyond about 12.5 gms.

I think the soot mass not going long enough triggers a failed regen and the light and mil lights do come on every 6months or so. I just reset them and the dpf (which i know your not supposed to) and then i am ok again for another 6 months. I know the DPF is regenerating just not down to the lowest it can go.

Cheers

J

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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


Hey J, I did get the PIDs working thanks.
My dpf does make it to 0 during the cycle, once the cycle finishes it usually goes back to 3-5 but I have had it sit as low as 0 for a fair while after the cycle in the past when I was doing a trip to Rockhampton.
Dpf mode sits on 1 a lot of the time and seems to flick between 1 and 4 in occasions when there's a bit of soot but it's not sure if it wants to run a cycle, usually from around 12g or so until it does the cycle. Image
This was a cycle I caught back in June and it only hit as low as 7ish and came up to 9ish after the cycle. I think this was before I moved to c4 oil and well before I found a vacuum leak and fixed that.

---
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.
12/Sep/2020, 8:19 pm 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: 5945
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Re: Some DPF Pids for OBDii Scanner


Thanks Daryl for sharing the graph.

A note for you and others about Imgur pics inserted as images, if you right-click it will open up a shortcut menu where you can then click View Image and will take you direct to the full-size image on their website.
Maybe you might wish to add a note as such to all your future image insertions.

---
Kev X450(c) T30 Guru
03 Titanium Ti T30 Series 1 **MODIFIED**
My Blog
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13/Sep/2020, 8:48 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


Thanks that's really good information and confirms the issue that i have. My DPF never goes down to 0. I've had it go back to about 9 once but never got it anywhere near 0.

I think my DPF being after market is mismatched to the DPF sensor and eventually causes the DPF/Mil lights to come on.

Why Nissan didn't provide a way to access this information easily is beyond me - it would have saved so many people unnecessary pain and trips to the garage. It's also strange that the ECU is easily capable of providing this information but most scan tools including the Consult III, GSCAN2 only show dpf pressure differential not soot mass and that is far harder in my mind to monitor what is going on.

Cheers

J
18/Sep/2020, 2:32 pm 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: 5945
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Re: Some DPF Pids for OBDii Scanner


Not everyone who drives a diesel is technically minded enough to know what soot mass means and what value would require an upcoming regen so Nissan have probably hidden all that information from the display to just have the computer work it out itself and show the warning light if a regen could not be done when required.

---
Kev X450(c) T30 Guru
03 Titanium Ti T30 Series 1 **MODIFIED**
My Blog
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18/Sep/2020, 11:57 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


Agreed although i think with a bit of good UI it could be done. The japanese Xtrails have a button to trigger a manual regen - maybe they are smarter than everyone else emoticon

Also, i just hired a truck the other week and that had a DPF guage on the dash that showed the %full off the DPF with a note that if the light started to flash then you needed to pull over and press the DPF regen button.

J
20/Sep/2020, 9:04 am Link to this post Send Email PM   Send Private Message Blog
 


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