I've got a 56 plate focus 2.0 diesel,and it's been going in to limp mode,so I put it on my cars computer and it come up with a dpf fault,so I sent it into ford and had the fluid topped up,this was fine for about a month now it's started doin it again!!!!so it's brought up the same fault but since my mate reset it ,it hasn't done it!!now I've been told by one person it's coz the missus is only doing short journeys!and I should take it up the motorway once a week?but someone else as said I need the dpf changing?also the car as been remapped,who that be the reason ?if anyone can help it wud be appreciated.

 

Short journeys with a diesel that has a dpf is a deadly combination for the dpf.
The journeys are not long enough to regenerate the filter.
A longer motorway drive (with high rpms) may regenerate the dpf.
The remapping doesn't make it better. I can't see from here whether or not that has been done correct without risks for the dpf.

Whether or not you have to replace the dpf also depends on the code you read.
What's the number of the code?

 

The remap was done a ford specialist,but it was the first one that they had done,also when they put it on the rolling road,it was already showin that it was 153 bhp,yet it was only suppose to be 136 bhp.it's now 179.I think that it was p242,cheers for the reply

 

the rollers could well be out and/or its a very good engine you have thats running well so i wouldn't go on the actual figures just the difference between before and after. bet it goes a bit nicer now.

dpf's are fucking stupid idea and they only seem to cause problems on modern diesels. they are supposed to help reduce emmisions but you'll find that when they start to clog the ecu dumps more fuel in to help burn off the crap in the filter to regenerate it. this is rather counter productive. also, in the owners manual it will probably say the car needs to be driven for 15 mins or more at regular intervals at high rpms to help clean the filter.

you're better off without the fucking filter

you can legally remove the filter but you may find it lacks in performance due to the low back pressure telling the ecu to under fuel a bit. his can be sorted by a propper remap. certainly thats what my mate found on his mk7 fez zetec s tdci though at first noone could crack the ecu so e had to run 2 tuning boxes. one for upping the fueling low down in the rev range and one for high up the rev range as one wasnt able to cope. i know shite solution but i think its all been sorted now with a proper remap.

 

I think it's a common fault and the fluid needs replenishing and thats not something that is DIY unless you know what your doing either as the fluids toxic.

Will it pass MOT if you removed the DPF though due to higher emissions?

Martin

 

I totally agree with u it's counter productive and it's startin to get on my nerves,coz when I was told that it needed changing I've been given quote of Ł1200,so I went back to the garage to have it done on the warranty and they said it's wear and tear,and won't help,so will it pass the mot without it on?the mot is up the end of the month so will it fail how it is now?

 

I have already had the fluid changed at ford and then they reset it on the computer,but the problem come back after a month!!!I wish I'd done my homework on the car abit better.

 

i wasnt sure what you were on about with "fluid" so i've just had a quick google and aparently this extra tank contals a fuel additive which is injected into the fuel tank or fuel system to help with the filter regeneration.

http://www.autodiagnos.com/fileadmin...e_overview.pdf

i did not realise these systems existed and to me it seams like another waste of time and extra expense. if your car did not have this system and it was just a filter then i could easily say just remove it as diesel emmision are not done in the same way as petrols are, its just a smoke test and any performance loss could easily be mapped out without any problems. by removing your filter you may have some ecu trouble as it may start throwing up codes.

unfortunately i dont know any more about this subject to help you further, sorry. if no more info can be gleemed from the internet on your type of system and if it can be removed you're next port of call should be a diesel specialist as they will have a lot more info on this subject and will more than likely have come accross your problem several times and a least be able to fix it at a more reasonable cost.

one things for sure, modern diesels need to be thrashed to within an inch of their lives every so often!!

 

Thank u for the reply phil it's much appreicated mate,ive come to the conclusion it's the missus fault for not trashing it,but the main reason is coz she should have let me have the st I wanted,lol thanks again.

 

haha its definately her fault

not a problem mate i like to help. good luck with fixing it.

keep this thread updated if you can 8)

 

p242 doesn't exist. There's a digit missing.
If it was P0242 then it's a turbo boost "B" Circuit High.