DPF advice - Nissan-Navara.net
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post #1 of 24 (permalink) Old 25-05-17, 11:59 AM Thread Starter
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DPF advice

I realised the other day that I have never seen my truck do a regen cycle despite doing 15,000 miles over the last 6 months and at least twice a week having a 3hr stint in the truck on a motorway.

I have had a look underneath and my DPF is present but there are no sensors or wires going to it. So my question is how will the truck know when it needs a regen?

I can post photo's if needed and if anyone else has photo's of their DPF and can upload that would be good for comparison.
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post #2 of 24 (permalink) Old 25-05-17, 12:20 PM
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There's definitely an injector plumbed into the dpf on my V6, looking from the passenger side.

I have also done about 15k, I think it regenerated once as it was a bit smokey on a motorway journey (and the fuel consumption dropped), only a guess.
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post #3 of 24 (permalink) Old 25-05-17, 01:03 PM
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Never seen any visible sign - dash lights, smoke - or felt anything different on mine after 23K... It must have done a few regens by now. Runs smooth as silk normally and vicious as a tiger when needed... And agreed, on V6, I can see things connected to DPF - I assume they all need temp & pressure sensors to be able to regen.

The plural of anecdotes is not data. Anecdotes however, are better than hearsay.

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post #4 of 24 (permalink) Old 25-05-17, 03:17 PM
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Interesting that the Australian market does not have a dpf, it has a similar box in the exhaust, just nothing connected.
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post #5 of 24 (permalink) Old 25-05-17, 06:37 PM
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There is no indication that its doing a regen just a warning light when theres a fault
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post #6 of 24 (permalink) Old 26-05-17, 12:05 AM
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Originally Posted by gfromleeds View Post
There is no indication that its doing a regen just a warning light when theres a fault
That's my experience....

The plural of anecdotes is not data. Anecdotes however, are better than hearsay.

2014 Nav V6 (quite nice for a pickup truck) & Celtic Rambler (awesome as a mobile luxury flat).
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post #7 of 24 (permalink) Old 26-05-17, 12:07 AM
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Quote:
Originally Posted by landmannnn View Post
Interesting that the Australian market does not have a dpf, it has a similar box in the exhaust, just nothing connected.
Maybe they have different emission regs there so Nissan fit a dummy box in order to keep all the exhaust parts as a common fit around the world? That'd be odd though, even with Nissan....

The plural of anecdotes is not data. Anecdotes however, are better than hearsay.

2014 Nav V6 (quite nice for a pickup truck) & Celtic Rambler (awesome as a mobile luxury flat).
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post #8 of 24 (permalink) Old 26-05-17, 04:14 PM
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Quote:
Originally Posted by gfromleeds View Post
There is no indication that its doing a regen just a warning light when theres a fault
On my previous 2.5 2009 Nav the regen light would show whilst the regen took place. The V6 doesn't unless a fault occurs.
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post #9 of 24 (permalink) Old 29-05-17, 03:13 PM
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Strange my 57 auto the dpf has never come on in 3years 50,000k until i fitted a dte box which caused too much smoke and created a dpf fault
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post #10 of 24 (permalink) Old 30-05-17, 10:10 AM
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Might be coincidence, and perhaps your DPF was getting close to getting clogged anyway? Extra soot from a tuning box won't help though.

Either way, it seems daft to me for any vehicle to show a dash light to tell you a regen is happening - it's alarming and distracting; why would anyone care as it is supposed to a normal, regular function. You wouldn't want say, the alternator charging light to come on every time a smart alternator comes on the charge a battery, right?

I want warning lights that are for faults. Or for useful information that I can do something about (like indicators, or headlamps being on).

Is it possible that people are mistaking a DPF light coming on as a result of a real fault, but one which self-clears if a successful regen occurs? I know that the ECU makes several attempts to complete a regen when needed and it remembers that one was in progress if you stop after only doing short trips - maybe the light is about "X" number of uncompleted regens and it means "go for a long drive" ! What does it say in the various manuals about the DPF dash light? Fault or just information?

The plural of anecdotes is not data. Anecdotes however, are better than hearsay.

2014 Nav V6 (quite nice for a pickup truck) & Celtic Rambler (awesome as a mobile luxury flat).
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