Peugeot Forums banner

Aftermarket DPFs?

727 views 7 replies 4 participants last post by  Mihael_M  
#1 ·
While trying to figure out what to do to make my car pass our emissions control here in Slovakia, I got the FAP app and a bluetooth code reader, and tried to regen the DPF. Several times the error code P1457 came up about the exhaust differential pressure sensor, with the explanation that the DPF filter is punctured or absent. Likewise, regardless what percentage soot load was indicated, the FAP pressure was always low, only changes basically with how hard the engine was running (from 0 - 27mbar).

So, I think it is quite likely that the DPF has been somehow punched through. And given that we live in a rural area, and the old tractors people drive around and smoky stoves in the winter are a much bigger source of particle pollution than our Peugeot, I wouldn't feel much guilt about this, however, I need to pass emissions. The max smokiness value allowed for our car (2010 308 SW 1.6 HDI) is 0.55m-1, while it failed with 3.6m-1. And while I think some of this may have to do with the PCV valve leaking oil, I don't think there's any way the car can actually get down that low without a DPF filter.

Well, I was told that if I pay someone 160 euros, they can make it pass-- but that will quickly add up every 2 years!

So I want to replace it, and I see online what looks like half of the CAT-DPF tube being sold. So does that mean that the original one gets cut in half? I'd want to keep the original CAT if possible, as I assume it is going to better than a replacement one. And do the replacement DPFs last a decent amount of time? I'll make sure to keep an eye on its sootiness and plan to visit the Tatra mountains to take a hike more frequently so it will get a chance to regen on the motorway.

Also, can anyone point me in the right direction of which diagnostic cable to buy for my car to run the Peugeot software?

Screenshots from different alleged sootiness levels:

 
#3 ·
You should take out the filter and check what's wrong with it. If it's clogged, it must be replaced. Attached is a picture of your DPF. It has 2 parts and should be cleaned. But there is no point in talking if the DPF has already been drilled and the DPF function has been programmatically removed.

As for the diagnostic program, the FAP App you have is enough to work with FAP. I use Lexia 3 (device) and the Diagbox program : PSA-DIAG - Diagbox 9.180 + MAJ 9.186 FREE 2024 - Forum Entraide Diagnostic Peugeot - Citroen - DS - Opel .

Image
 
#4 ·
Thanks for this diagram and other info. Yea, I guess it hasn't been programmatically removed, if I can still see info about when regeneration last happened, which changes, and still get an error code for the sensors. And if it would have been, is that some option in Diagbox that could then be turned back on? Because like I said, 160 euro every two years is to me a steep price, especially if, say, in 2 years the guy who has the connections to cheat the system would be caught/disappears and then I have to make it again legitimately pass.
Kind of regret now not buying the 5008 I was also considering, but got cold feet over as the seller claimed there'd never been any sort of wreck, and there obviously had been fender benders due to both public insurance records and obvious differences in paint shading.
 
#7 ·
Took off the top heat shield to get a better look, and I realize that this isn't the original FAP. There are places on the heatshield that were cut, and I can see it was done to accommodate a different location for sensors. Nor do I see that this one is separable, but is just one piece. Which would make drilling the FAP difficult, but maybe someone just banged it with a hammer and knocked out the FAP?
Incidentally, the Lexia 3 just came, so is there any way from that to tell if the ECU was changed?