Thought id ask on here

My dpf light came on, has before fort self cleaning, but this time its come on and I'm now stuck in limp mode!

Is there anything I can do to get it out of limp mode? Before I end up having to pay a dealer!

No engine management lights on

Oh its an auto 07 navara

Cheers

 

here you go mate

http://www.aa-academy.com/Training/L...er%20(DPF).asp

 

Seems like its a dealer job then

 

Drive the car at 50 or moe mph on the motorway for 30 mins minimum, ideally at a steady state throttle and hope it can regenerate. If not, dealer for you.

 

No go stu, the dpf came on and pretty much went into limp mode, won't rev more than 3k and top speed of 35mph, that takes about 30 seconds to get there!

Booked into a dealer wednesday, 108 quid just to check it

Looks like I'll be bussing it to work for the next few days !

 

You can get the dealer, or a workshop to do a regen on the car. It may work, but the problem will return, and DPF replacement will cost a lot of money. Get rid of the filter, and get a someone like Stu on here to fit a chip, or remap. Cheapest way in the long run.


John

 

On certain diesel cars it possible to remove the DPF and then alter the map to stop the DPF being part of the program anymore, Stu should be able to tell you if this is one that his company can do or not, then that way at least its gone forever and you dont have to keep getting stung by the dealer in the future.

 

Had been looking at by passing it, seems the only off the shelf pipe available comes oz

 

do you know anyone with a mig? if not you just need to smash through it with a hammer and chiesel. Bloody dpf's! you must do a lot of town driving with lots of short stop starts? thats what chokes them, as mentioned the car will normally regen when its up to temperature and you have been cruising for a bit

 

All I really do it town driving, sitting in traffic constantly, I just didn't know anything about them until I got my 1st really moddern car! Should have stuck to older stuff.

Or they should lable cars with dpfs as unsuitable for town drivers who sit in traffic alot

 

i agree, its bollocks, all you do is collect all your carbon and dump it on the motorway*, the car is no cleaner! all the royal mail postie vans were recalled and the dpf's removed and coded out...
*or not in your case, you still own all yours

 

fucking dpf's, what a load of crap they are.

fingers crossed the dealer can sort it without a replacement for cheap and then you can remove it/smash the fucking innards out and get stu (if he can) to sort the map out. your troubles will be gone then and more than likely better mpg, certainly won't be less!!

i like modern diesels for the power but hate them for the stupid high fuel pressure causing problems and these stupid dpf's and dpf's (only on cost though)

 

Try removing the DPF yourself, and putting it in an oven for a bit, can't remember the time and temp we do ours at or I'd tell you

 

Oh and check your oil, if it's been hosing fuel in trying to regen, fuel may have got into the sump

 

I like the oven idea, just the dpf is massive and wouldn't fit.

Plus my ovens broke, waiting for a new element, more money yep real tears!

 

Sorry, DO NOT use your own oven

Use an industrial one, few hundred degrees for 2-3hrs will clear it out, put it back on the car and happy days, not sure if you'd need an ECU code reset or whatever still though

 

very very valid point, heard recently of one of the crap 1.3 corsa diesels with the fiat engine filling its sump with diesel doing the same thing, then it ran away with itself (running on the oil through the breather from the sump), hydrauliced then died.

 

So diesel in oil what an I looking for, take it you can't just check via the dip stick?

 

Yes if its bad enough the sump level will actually rise! If not too bad, it should just flash off once you get the car working again and get the oil temp nice and hot

You can usually smell it very easily too, but can be hard to tell with a diesel via this method

 

hmm, the oil on my dip stick is well high!, will check tomorrow again when im home from work ( getting the bus )

 

Has probably been chucking fuel in to no avail then mate

Drain it all out and change oil and filter, at least you found out!

 

well thought i'd take the dpf, as nothing to loose, one of the pipes fitted looked like it had been attacked before,

so did find it slightly amusing when the wrighting on the top of the dpf in tipex said " 08 nissan D40 auto Ł150 " mines an 07 btw

So its not even on its original dpf!

They most be proper shit

 

well i started the navara up, well ive not driven it , but reved it on the drive to 4.5K, going well past the 3k it stuck at before.

now obviosly ive got none of the 4 sensors pluged in as there still in the dpf.

am i going to damage anything.........? by driving it about???????

 

i wouldnt drive it but you can wash it out with heavey detergent and stick it back in and thats it clean it will still have the dash lights on because it got soo bad it went into limp mode but you any of your mates have a code reader they can try and cancel the engine light and it SHOULD start a manual regeneration itsself! and when it does take it for a good drive like stu said

on the diagnostics plug there is 2 ports you can probe and they will make the nissan start a manual regen like the dealer would carry out but of the top of my head i dont remember which one sorry

 

you can wash it out?

As in , is it worth me getting the pressure washer in it and giving it a blast??

 

yup the dpf filter itself it just like a honeycomb structure that blocks with carbon like substance.

i would try and remove the sensors first but that could be easier said than done if they dont budge leave them. use very stong detergent but use non-costic (non acid) stuff and spray it in and let it soak for a min or 2 and then crack open the powerwasher and wash it out youl be amazed to see the amount of crap that comes out and wash it out the best you can and either let it dry or stick it back on and start up your jeep and itll self dry and thats it cleaned out, then just get your lights cancelled and it should start regening itself and if it does drive it.

but by washing it out youve cleaned it anyway and thats what the regeneration does but it does it by adding more diesel into the system and making the exhaust very hot by more fuel and holding a high rev on the engine and it burns itself clean so to speak but i have seen times that the filter gets that blocked that it wont regen and you have to wash it out anyway.

hope that helps sorry to rant on

 

rant on all you want, with the decent advice

 

lol only trying to help someone out as i know the dpf system can be daunting, oh and as someone mentioned check your oil level aswell just incase some diesel has contaminated the oil and might need a oil and filter change

 

I wouldn't wash it out, you could damage the brick/filter so to speak, and is your cat and DPF all in that one unit? Quite likely it is, and we all know cat's don't like water

Really, if possible you should seperate the cat and DPF before baking it too, or it will age the catalyst

 

our trucks have dpf's on them and they are a fooking pain.
constantly getting the dpf light on the dash and also been in limp mode a few times and had to have the truck recovered.

worst inventions ever

 

its one unit, and sealed, but its was pretty much useless, its now had a good pressure washing, will refit it tomorrow, and see what occurs!

 

did you get alot of gunk and black water out of it?

 

A fair bit not as much as I expected tho?

 

It may have been enough to save you then, just gotta try it!

 

its all the sales mans fault they dont ask customers what they use their cars for,are lot sale motability customers diesels with dpf total waste of time as they are always in town,if the dealer cant get her regen it will need a new one,but it could something like a split pipe for the pressure sensor,egr problem or even something as simple that it needs a additive added if this model requires a additive of course

 

well this morning,,

in neutral revs to to the limit, driving, still limited to 3k and really strugles, only got the dpf light on tho, no eml?

Im going to refit the dpf, and in neutral rev it to 3-4k , to try and get the dpf hot and to regen, if thats seems the right thing to do.

Tho if it is limp mode ( remember no eml on ) is there anyway i can get it out of it?

 

is it revving freely in neutral?pressure wash it not a good idea with them lol i just read that mr muscles works well with warm water tho

 

yes, revs freely in neutral, but ive not got the dpf fitted, its going back on after the F1


And its been well pressure washed out

 

have you checked the pressure pipes for any splits?did you get lots of black sludge come out?

 

didnt get loads of black crap out really?

hmm as in turbo boost piping? no ive not checked, that, as it was the dpf light that come on i was drawn towards that, will take a look