DPF Filter advice???

lottie3000

About 6 weeks ago my car displayed a fault, took it to my local garage who said the dpf filter needed changing, which I had done 696 lighter in the pocket. I had various issues after as they couldn't get the engine management light to go out so it went to the main dealer to have this done. It has on Monday re-diplayed this fault and after the local guys taking it to the main dealer I have been told that after market dpf filters are pretty un-reliable and the best thing that I could have done is having the filter removed, another 400 for the main dealer to do this. No have I got any come back at all on the garage that carried out the original work. I did pay by credit card but can't see that I would have much come back on that.

Geodark

lottie3000 wrote: »

About 6 weeks ago my car displayed a fault, took it to my local garage who said the dpf filter needed changing, which I had done 696 lighter in the pocket. I had various issues after as they couldn't get the engine management light to go out so it went to the main dealer to have this done. It has on Monday re-diplayed this fault and after the local guys taking it to the main dealer I have been told that after market dpf filters are pretty un-reliable and the best thing that I could have done is having the filter removed, another 400 for the main dealer to do this. No have I got any come back at all on the garage that carried out the original work. I did pay by credit card but can't see that I would have much come back on that.

Did you give them a chance to rectify their original work? If not then I don't think you would have. Ideally you should have gone back to the garage and got them to look at fixing it.

lottie3000

I have always gone back to the original garage they are the ones that have been taking it to the main dealer as they can't get the dpf fault to clear, so the main dealer needs to use thir equipment. The original garage has paid twice for this to be done.

I have now been told that the aftermaket filter that has been used are no good and most last a maximum of a year (by main dealer)

BeenThroughItAll

lottie3000 wrote: »

I have always gone back to the original garage they are the ones that have been taking it to the main dealer as they can't get the dpf fault to clear, so the main dealer needs to use thir equipment. The original garage has paid twice for this to be done.

I have now been told that the aftermaket filter that has been used are no good and most last a maximum of a year (by main dealer)

There's several issues here - the first is that obviously, the dealer will say their parts are better as they want to sell you them.


Secondly, it's possible that the light keeps coming back on because your driving style and types of journey aren't suitable for a DPF equipped vehicle.


What make and model of car is it, what mileage is on it, and what sort of use does it get/how many miles does it do?


Third thing is, for a dealer to supposedly suggest removing the DPF is ridiculous, considering that as of October this year not having a DPF fitted if the car originally had one for type approval will be an MOT failure.

lottie3000

Hi, The car is a Nissan Qashqui 2 litre Diesel. I do 15 miles to work on the motorway, potter about at lunch time and then 15 miles back home.

thanks for info on the dpf as both the garage and the main dealer have both said to remove it.

BeenThroughItAll

lottie3000 wrote: »

Hi, The car is a Nissan Qashqui 2 litre Diesel. I do 15 miles to work on the motorway, potter about at lunch time and then 15 miles back home.

thanks for info on the dpf as both the garage and the main dealer have both said to remove it.

To be honest then, the main issue is that you're not really doing the miles to make a modern diesel 'work' properly.


My work had a QQ diesel as a hire vehicle when one of the regular cars was off the road. We're right next door to the A1(M) and it would take at least five or six miles just to get up to normal operating temperature even going straight onto it. If you're doing similar, 10 miles at normal temperature isn't really enough to allow it to regenerate the DPF, so whatever you do, you're always going to end up with DPF issues with that drive cycle.


Removing the DPF will be an MOT fail (as well as being probably *technically* illegal since it will mean your vehicle is no longer compliant with C&R regulations - that's a different argument) soon... Many people 'get around' that by having the top of the DPF sawn off, the guts removed and the top welded back on, then the engine electronics remapped to remove the regeneration cycles and DPF light. Unfortunately, at some point in the future the MOT may well go from 'visual check for existence' to 'diagnostic/emission check for functionality'.

Retrogamer

BeenThroughItAll wrote: »

Third thing is, for a dealer to supposedly suggest removing the DPF is ridiculous, considering that as of October this year not having a DPF fitted if the car originally had one for type approval will be an MOT failure.

Is it not already a failure from Feb this year?

OP
Ask the garage if they will MOT your car with the DPF removed since it's both an MOT failure and illegal to do so.

BeenThroughItAll

Retrogamer wrote: »

Is it not already a failure from Feb this year?

OP
Ask the garage if they will MOT your car with the DPF removed since it's both an MOT failure and illegal to do so.

Hmm, possibly. Had it in my mind it was October, I may be wrong.


EDIT: Apparently I was wrong. Sorry, it's already an MOT fail!

OnanTheBarbarian

Diesel turds just need their heads kicking in on a regular basis to stop the filter clogging in the first place, dirty sooty things.

loskie

http://www.honestjohn.co.uk/faq/diesel-particulate-filters/
useful info here especially the Ceramex link.

Gloomendoom

Nasark786 wrote: »

If you replace the filter with an after market part as opposed to a genuine one you will generally get problems more frequently and it will clog up quicker. The company that replaced the filter probably don't have the equipment to clear all the Ash counters and reset dpf and pressure sensors. The best thing is to remove the filter and have it reprogrammed. I would recommend **************** I had a similar problem on my VW golf 2.0tdi. But these guys done a great job. They transformed my car.

Into an MoT failure. Nice job!