AdBlue/DPF issue/failure

[MarkyD1977]

Hi All.

I have had my 2017 308 GT Line 2.0 blue HDI in at my local Peugeot dealer.

I had pluming white steam consistent with an AdBlue injector fault.

Peugeot put it on the computer and diagnosed a failed AdBlue injector and this was replaced. This in turn had shown up a blocked DPF. I have previously had no issues with the DPF (67,000 miles), I do lots of long runs and motorway driving.

They decided that it was likely that the DPF was filled with crystallised AdBlue....makes sense right?

In total, they ran four regens. In this process, the car showed up oil dilution (as a result of the regens I guess) and they changed the oil and filter (they claim).

They have now told me that the DPF has "failed" and needs replacing at £1200+ and another oil change and filter (dilution 6% whatever that means).

My issue is this. AdBlue crystals don't really combust or burn off, not like soot would. Multiple regens seems like a strange choice by the technician. Surely this would just bake it on and into the fine holes in the DPF? I am extremely unhappy to be told a previously functioning DPF is now knackered following this intervention. AdBlue crystals are water soluble, surely some sort of flush should be possible?

The technicians are also at odds about whether DPF removal and cleaning is an option with one guy saying they sometimes do it and another saying they never do.

I am not a trained mechanic but I have a reasonable understanding of these things and I feel fobbed off. I can't believe that multiple regens to clear AdBlue crystals is ever likely to be a Peugeot service procedure.

I would be really interested to hear the opinion of anyone more clued up than myself and if this is something worth contacting Peugeot UK about.

TIA.

[RichardW]

I'd be very cross!! If at first you don't succeed, keep trying till you break something. FFS!! If one regen doesn't fix then why is 4 going to??? Unfortunately you're going to struggle, but I'd be demanding to see the manager and suggesting that he gets it fixed at no cost to you, and if they can't, that you will take it elsewhere and sue them for the costs. You might struggle to get it out of there without paying, trading STDs might be able to help.

[GiveMeABreak]

I agree that attempting to 'burn' off crystals is a bit stupid, whereas a liquid flush or a clean through, maybe with some anti crystallisation added would of been a better solution as you say.

Peugeot will no doubt say that the problem existed before their intervention and they were just trying to try this before replacing it. So hard to say really, but your mileage is about roughly half the life that the DPF would be expected to function for. So whether they would cough up at least half the cost for a new DPF as a good will gesture....

[Andrew]

Hello,Have you sorted this problem now? I seem to be having the exact same problem with the exact same car? Garage think removing the dpf to clean it will work.