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 Post subject: DPF debate
PostPosted: Tue Apr 13, 2010 8:09 am 
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Newbie

Joined: Fri Jul 03, 2009 5:40 am
Posts: 6
Location: Fife
Car:: Xtrail
Model: 2.0 dci SVE (Irish import)
Year/Plate: 2009
Colour: Silver
Like many other contributors on this and other sites I have concerns re: the DPF and the regeneration issue. My wife uses my 2 litre 150bhp diesel mostly and does mainly short hops during the week and it probably rarely gets warmed up properly. It is only at weekends that I have the opportunity to give it a decent run. It seems really odd that in these days of supposed greener motoring I have bought a eco 4x4 ! and yet I have to 'waste' fuel in order to stop the DPF clogging. At what sort of interval and for how long do I need to give it a 'thrash' up the motorway to avoid this problem developing and how will I know if the regeneration has taken place? Any advice will be gratefully received.

Cheers

Paul


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 Post subject: Re: DPF debate
PostPosted: Wed Apr 14, 2010 10:31 pm 
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Soft Roader
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Joined: Sun Jun 01, 2008 8:50 pm
Posts: 22
Car:: Xtrail
Model: T31 Aventura Explorer Extreme
Year/Plate: 07/57
Colour: black
Mods: Rear Spoiler, Illuminated door sills, Second lhs drawer
Hello Paul,
my 57 plate t31 has now covered 31k. The DPF warning light has come on approx 6 times. The light illuminates to indicate that 5 failed regenerations have occured. You have no way of knowing when the regeneration starts, but if it hasn't finished when you switch off the engine, a failed regeneration is logged in the ecu. My dealer has since reprogrammed the ecu so it now takes 10 failed attempts before the light illuminates.

Back to your original question, my dealer recomends that at least once a week you drive at 2500 to 3000 rpm for 30 miles. I normally do 60mph in 4th gear. You may notice a smell from your engine when you stop, various ideas have been put forward for this, but it would appear that it is the dpf filter cleaning it's self. The smell is usually like burnt rubber.

Dont forget after a long high rpm run to let your turbo spool down for 2 minutes. If you go on the Honest John web site you can some good info and advice.

note for other members. T31 XT to be face lifted this summer according to this weeks Auto express. Dealer said its true but he was not sure what the changes would be, but guessed that the connect radio etc would be one of them.


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 Post subject: Re: DPF debate
PostPosted: Thu Apr 15, 2010 9:28 am 
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Newbie

Joined: Fri Jul 03, 2009 5:40 am
Posts: 6
Location: Fife
Car:: Xtrail
Model: 2.0 dci SVE (Irish import)
Year/Plate: 2009
Colour: Silver
Hi Pac,

Thanks for the info and I will take the advice. I too have had the 'burning rubber' smell and wondered what it was. I haven't had any problem yet with the DPF but the car has only done 900 miles to date, I was merely concerned with the sheer volume of posts on this and other sites regarding the DPF and limp home mode. Mine is due for its first years service in July would you consider it worth asking the dealer to reprogramme teh ecu as yours has been done? Did the dealer charge for this adjustment or was it done under warranty? Even though nothing has happened as yet I have lost some confidence in the car and am 'waiting' for the first event. I wish I had known about this potential problem before I purchased it.

Thanks again

Paul


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 Post subject: Re: DPF debate
PostPosted: Thu Apr 15, 2010 10:28 am 
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Soft Roader
User avatar

Joined: Sun Jun 01, 2008 8:50 pm
Posts: 22
Car:: Xtrail
Model: T31 Aventura Explorer Extreme
Year/Plate: 07/57
Colour: black
Mods: Rear Spoiler, Illuminated door sills, Second lhs drawer
Paul,
The dealer did not charge for the re programme. I have read a number of posts re the DPF issue and I agree it's not an ideal situation, but all the cars that i've ever had have benefitted from a good run on the motorway. My 2 1/2 years with my XT have not been fault free but on the whole its the best car that I have ever had.

Enjoy your new car and dont worry as my dealer said to me 'were here to help and that what a warranty is for'.

keep us posted.

Paul


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 Post subject: Re: DPF debate
PostPosted: Fri Apr 16, 2010 2:32 pm 
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Newbie

Joined: Tue Feb 23, 2010 5:30 pm
Posts: 17
gents, my pennies worth here, i have been in the motor trade for 25 yrs, two yrs ago i bought a new 2.0 173 bhp diesel xtrail for her as a bit of a thankyou with the idea i could give her something i would not have to put a spanner to for at least three years, within 3 weeks of owning it, the dpf light came on, dearler suggested it the drivers fault, so i instructed my wife to give it a good run a t least once a week or make it work a little harder in the lower gears around town as bizzarrly they don t like town use as the dearler said, since then it has come on with more frequencey than i care to recall, sometimes the dpf light is very closely followed by the mil light, this is in my opinion the worst dpf(regen) system i have ever come across in my years in the trade. i have had starting trouble,hesitating and this dpf system, today its going back again for the dpf/mil light. i have told them that in my opinion there is something just not right and i do not want the car back untill something is done about it, if i had the benifit of hindsight i would have spent my 27k on something else. complete )($£.


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 Post subject: Re: DPF debate
PostPosted: Fri Apr 16, 2010 11:52 pm 
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Off Roader
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Joined: Sat Apr 03, 2010 10:35 pm
Posts: 135
Location: Sydney, Australia
Car:: Xtrail
Model: T30 Ti Series 1
Year/Plate: 2003
Colour: Silver
Mods: Too many to list here :o) See my ride from my signature link
Making it work harder in the lower gears will clog up the dpf quicker.
What is needed is a good motorway run at a constant speed greater than 80kph for longer than 10 minutes.
Another thing which will help is using high-grade diesel fuel like BP Ultimate (as it is called here in Aus).

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 Post subject: Re: DPF debate
PostPosted: Sat Apr 17, 2010 4:41 pm 
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Xtrail Nut

Joined: Sun Mar 08, 2009 7:50 pm
Posts: 905
Car:: Xtrail
Model: 171 bhp
Year/Plate: 2008
Colour: grey
Mods: none
I complained to my dealer that to do 50mph where we go on holiday (Isle of Mull) is dangerous, he told me the speed is not so important but a constant 3000+ rpm, in say a lower gear. Its a pain, but google "DPF problems " and you will find similar problems with most makes. If it wasn't the fact that I tow a caravan I would go back to petrol.
revhead is probably correct, in my previous car it was foot hard down that created most black smoke out of the exhaust which is what the DPF collects.

_________________
Chris, 2008, X Trail, T31, 171bhp, 62000 miles and counting, caravan tower (1380kg). DPF hater, but better luck lately, 26k 2yr and no DPF light!


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 Post subject: Re: DPF debate
PostPosted: Thu Jul 15, 2010 7:33 am 
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Xtrail Nut

Joined: Sun Mar 08, 2009 7:50 pm
Posts: 905
Car:: Xtrail
Model: 171 bhp
Year/Plate: 2008
Colour: grey
Mods: none
Just back from an identical holiday on the IO Mull and no DPF problems. I think because I kept the revs above 2500 where ever posible, generally by being in one gear lower than I would normally have been in. MPG did not seem to suffer. In fact by doing this since last year I have had no DPF light in 12k miles.

_________________
Chris, 2008, X Trail, T31, 171bhp, 62000 miles and counting, caravan tower (1380kg). DPF hater, but better luck lately, 26k 2yr and no DPF light!


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 Post subject: Re: DPF debate
PostPosted: Sun Jan 15, 2012 9:43 pm 
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Soft Roader

Joined: Sun Jun 26, 2011 8:25 am
Posts: 21
I think the dpf light on problem is only a problem on the early 2008 models.

Consider this, my 2009 FEB model 171bhp has just sailed through its test.

Has only covered 18.6K miles, mainly short trips locally, or towing.

And i have never seen a DPF light up.

In fact i recently checked it to make sure it worked.

Note however, that i do very little city driving, just town.


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 Post subject: Re: DPF debate
PostPosted: Tue Feb 07, 2012 9:59 pm 
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Newbie

Joined: Wed Apr 06, 2011 11:03 pm
Posts: 6
Just sold my 2007 T31 and treated myself to a 2012 Tekna 150. I had the old car for 4 years and the DPF warning light came on only once - and was quickly cleared. I assume, therefore, that my driving suited the car.
Now, with only 420 miles on the clock of the new car, the DPF light is on and motorway/dual carriageway thrashes will not extinguish it. Bizzarely, the light actually came on while I was doing 70+ on a motorway!
So, it's back to the dealers tomorrow. I used to wonder why so many people on this forum had DPF troubles when I had none - now I dread to think that I may be joining them.


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