Blocked DPF (Diesel Particulate Filter)- A5 3.0 TDI Quattro auto

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Roentgen

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I just have done 44, 000 miles in my A5, which will be 5 years old in December. Most of my journeys have been in town and I am now paying the price. The engine management light keeps on coming and the error relates to a DPF. I will take it our for a long run, tomorrow, in 4-5th gear at 2000-3,000 revs to try and clear it. I have already had one episode of power failure and had to limp home slowly.

It looks like it is time to sell and and given the nature of my drinking, change to a petrol engine?

Any thoughts?
 
If you don't do that many miles then maybe petrol would be better. I probably only do 8-10K a year but I really like the way diesels drive.
I would suggest that if you want to keep the car get the DPF gutted and the car mapped. It's a much better car with better fuel economy and no more DPF worries.
The problem with a DPF is that if the regens occur too infrequently because of a lot of city driving they won't get cleared. A car on a motorway will get the DPF hot enough to do passive regeneration so thats why high mileage cars always fair better with DPF's.
Even if you manage to complete a complete regen cycle the damage has already been done so to speak and the accumulated carbon in the DPF isn't able to be burnt off.
If you are anywhere near Manchester I would go and see Rick at Unicorn Engine developments, he mapped my car.
Theres a build thread linked in my signature.

Karl.
 
Three choices
1) Gut the DPF & remap as per desertstorm's advice. MOT failure if discovered.
2) Get the DPF cleaned by these folks. They have agents nationwide.
3) Buy a petrol.
 
John, many thanks.

I am currently in 'limp mode', and obviously need to get it sorted.

Option 1 is illegal , so I will avoid.
Option 2, DPF Genie, I will explore, but requires the unit to be removed. I'll call them on Monday am
Option 3 Will probably pursue, after getting the problem resolved.
 
Thanks for your help. I took the A5 to Andy & Tom at AP Engineering in Colchester (http://www.a-p-engineering.co.uk ), who are always very helpful. Their electrician diagnosed a faulty DPF pressure sensor. A new one was installed, the error codes were cleared etc and all is now well!
 
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