Im new Hi all. DPF issue

Brians Beast · 06-12-2015, 22:36

Ive got my 2nd x trail , a 2010 2.0 Tekna and the DPF and ECU light came on. Ive had a forced regen at local Nissan but said its failed.

Is this a common fault? Not paying 1500 for new DPF
thanks
Brian

AlexD333 · 06-12-2015, 23:26

I deal with a lot of dpf filters at work

The more you drive the more blocked it will become and the less likely a forced regeneration will be possible, imagine a pipe becoming blocked with cement, more and more being fed down the hole, eventually the hole will get so small and....

Usually If the engine light is on too that means you have gone past the point of doing a regeneration yourself, likely a Nissan technician with a laptop and try to force regen it on the road, 50mph steady speed no stopping.

On the jags atleast if you slow down the regeneration is interupted so not to cause fire.

Remember the dpf clears by pumping in loads more diesel to burn thus heating the exhaust to 600-800 degrees, with no air flow fire would occur..

Not sure with Nissan but again when the light goes out to say it's clear likely it is not empty, just at an "acceptable level" but if you carry on meeting the criteria whilst doing a regen for another 10-15 mins you might find it does not come on. As soon (criteria being no interruptions of speed ect)

Obviously as a town car you will forever be fighting the dpf as in town it will be filling all the time.

Every time you need to regen you will be contaminating the oil as well with diesel requiring service sooner. This occurs when it pumps extra fuel into cylinders to heat exhaust, some.passes the rings.

Hope this helps

Sweety · 06-12-2015, 23:59

There's a company not far from me that states they can clear them out

how true it is I don't know as never had any dealings with these DPF things

solarman216 · 07-12-2015, 00:25

my advise for what it is worth, cut it out and throw it away, Rick

Banshee · 07-12-2015, 01:28

Quote:

Originally Posted by solarman216

my advise for what it is worth, cut it out and throw it away, Rick

I'm sure you can't do that anymore Rick as I was told by the MOT tester at the water company I used to work at that if any vehicle that was fitted with a DPF from factory had had it removed then it was an instant MOT fail, something to do with some emissions regulation

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macabethiel · 07-12-2015, 07:43

Quote:

Originally Posted by Banshee

I'm sure you can't do that anymore Rick as I was told by the MOT tester at the water company I used to work at that if any vehicle that was fitted with a DPF from factory had had it removed then it was an instant MOT fail, something to do with some emissions regulation

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There are firms who will remove the DPF and fit a S.S. box with the original upstream and downstream sensors fitted and then do a software patch to remove the DPF fault code on a range of vehicles. Certainly you can do this for Chrysler 300 CDR engines. Makes it more economical too. MoT tester would be none the wiser if it visually looked OK.

AlexD333 · 07-12-2015, 23:54

Yes quite right, a dpf just removed would fail emissions, however if a remap was carried out correctly and the system drew no attention from a wise tester I see no harm.

06-12-2015, 22:36	#1
Brians Beast Junior Member Join Date: Jun 2015 Location: South Wales NP44 Vehicle: x TRAIL T31 Tekna DCI Posts: 1	Im new Hi all. DPF issue Ive got my 2nd x trail , a 2010 2.0 Tekna and the DPF and ECU light came on. Ive had a forced regen at local Nissan but said its failed. Is this a common fault? Not paying 1500 for new DPF thanks Brian

07-12-2015, 00:25	#4
solarman216 Off road maniac Join Date: Dec 2009 Location: Bexhill on Sea Vehicle: Y60 Patrol Me, 3 ltr Mrs Posts: 17,431	my advise for what it is worth, cut it out and throw it away, Rick __________________ Ex banger racer now off road maniac Lokka on the front with manual hubs Diff lock on rear 3 inch SS straight through exhaust Manly winch bumper with 13000 lb winch 10 spike ground anchor, with multiple straps and blocks Super strong body cills capped with scaffold pole 20% stronger springs all round aggressive off road tyres on wheels so just swap. Aim to get stuck and be completely self sufficient in extraction, love getting muddy, 2ft deep is good but rare.

06-12-2015, 23:26	#2
AlexD333 Senior Member Join Date: Jan 2014 Location: Uk Vehicle: 2004 Terrano 2.7 TDI Posts: 7,847	I deal with a lot of dpf filters at work The more you drive the more blocked it will become and the less likely a forced regeneration will be possible, imagine a pipe becoming blocked with cement, more and more being fed down the hole, eventually the hole will get so small and.... Usually If the engine light is on too that means you have gone past the point of doing a regeneration yourself, likely a Nissan technician with a laptop and try to force regen it on the road, 50mph steady speed no stopping. On the jags atleast if you slow down the regeneration is interupted so not to cause fire. Remember the dpf clears by pumping in loads more diesel to burn thus heating the exhaust to 600-800 degrees, with no air flow fire would occur.. Not sure with Nissan but again when the light goes out to say it's clear likely it is not empty, just at an "acceptable level" but if you carry on meeting the criteria whilst doing a regen for another 10-15 mins you might find it does not come on. As soon (criteria being no interruptions of speed ect) Obviously as a town car you will forever be fighting the dpf as in town it will be filling all the time. Every time you need to regen you will be contaminating the oil as well with diesel requiring service sooner. This occurs when it pumps extra fuel into cylinders to heat exhaust, some.passes the rings. Hope this helps

06-12-2015, 23:59	#3
Sweety Senior Member Join Date: May 2013 Location: Northumberland Vehicle: Terrano 2.7TDI SE LWB Posts: 3,604	There's a company not far from me that states they can clear them out how true it is I don't know as never had any dealings with these DPF things

07-12-2015, 23:54	#7
AlexD333 Senior Member Join Date: Jan 2014 Location: Uk Vehicle: 2004 Terrano 2.7 TDI Posts: 7,847	Yes quite right, a dpf just removed would fail emissions, however if a remap was carried out correctly and the system drew no attention from a wise tester I see no harm.