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My wife's 307 SW (2003 HDi 110hp) has a blocked dpf. We had the codes read and the garage have told us this is what the problem is. They want £288 to refill eolys and do a forced regeneration with the proviso that the dpf may still be faulty. Given the value of the car (£500 or so) and that there are other faults like a worn suspension ball joint I'm inclined to try removing the dpf and back flushing it. Or knocking a hole in it but of course that's illegal.
Will I need to reset any part of the ecu afterwards?
 

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Technically as its 2003 DPF is not a legal requirement and wont be part of MOT as not all vehicles had one. If you remove DPF you will need ecu remapped.

If you have the kit to read ecu (quite cheap on ebay now kwp100 or similar) there are various members including me who will map the file for free if you send to us

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I would try back flushing off the car using a pressure washer and if lots of gunk comes out refit and see if it makes a difference. If not then go the other route using windy1603 kind offer. But of course you will need something pipe wise to fill the gap!
 

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Take off the dpf and split it apart soak it in wynns dpf cleaner then powerwash it out there is a video on YouTube if you look it up also you will have to reset the parameters of the dpf afterwards the eolys fluid is 170 for 3 liters from Peugeot dont just refill because when I done mine the bag was actually split inside the box
 

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I'm not sure why you need to reset it all I know is when mine got blocked I cleaned it and the light stayed on and the dpf wouldn't regen until I got it done
 

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There is no level sensor on the additive tank so ecu does not know when its refilled and thinks tank is empty so disables additive injection and filter clogs and will not work again until counter is reset.

A 2003 car will use the original dpx42 fluid which you need 5 litres of I believe

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I removed my dpf and windy1603 kindly mapped it out of the ecu after I sent him the file.

I physically removed it from the car and then smashed out the insides of it before refitting it.

It made the car a bit faster and more economical and I now don't have to ever worry about it again.
 

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Discussion Starter #10
I can't find a kwp100 reader anywhere. Google doesn't seem able to find it.

I'll have a think about it. We're tempted to scrap the car given that the insurance (with a young driver ) and tax is costing us £90 a month and a bus pass is only £70.
 

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Buses are a hassle though especially if you have to whip out quick for something. They don't always run on time and now they are unrestricted they can cancel or delete routes at a drop of a hat!
 

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The car can fail automatically the MOT test if the filter had been fitted as standard but is found to be no longer present.
https://www.gov.uk/government/news/new-rules-for-mot-to-test-for-diesel-particulate-filter
The MOT Test - DPF - Diesel Particulate Filters
It will not fail as its before the cut off date for mandatory DPF. It will most likely not even be listed as a testable item on a 2003 307, unless its obvious you have cut DPF open as thats a general visual check.

You could also put on a non DPF exhaust system and it would still pass as the tighter smoke limit only applies to 2008+ vehicles
 

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I did post that it has to be original fitment and missing original equipment will fail a test.
I have a 2003 2.0 engined coke powered SW and the car has a DPF. I think it is coded in the VIN like most mechanical and equipment is.
 

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I don't think DVSA system is that clever I think it's only flagged on euro 4+ type approval and cut of date similar to CATs and airbags


My old 307 sw had one I removed it when dosing system died and it's still on the road with a new owner and 280k miles on the clock and has never failed on emissions

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I used a gallero tool for mine you may need someone to turn off the dpf in planet but a simple map out may be enough


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