2 hours ago, Shearers said:

On a simplistic level I'd check the DPF pressure differential as, my understanding (likely wrong) is that ASH buildup will give a higher reading than normal towards the time when it needs to be removed and cleaned (not necessarily renewed!)
Your NOx code may relate to AdBlue which I know little about but crystallisation and hence blockage of the injector is common (additive needed once the issue is sorted?)
The symptom of extended crank may be a clue...to something and slipping the clutch implies a major loss of power?

I’ve already tried checking the DPF differential pressure via Forscan, but it shows a fixed value of 0, even when I accelerate. My Focus is a 2015 MK3.5, so it doesn't have AdBlue. As for the slightly reduced power, I've been living with it for a while now (pretty much since I started this thread), and despite everything I mentioned before, I also did a full service and replaced the fuel filter, but nothing changed. I need to do a smoke test just in case there's a leak somewhere around the intercooler area.

Also, I've driven the car again and the check engine light isn't on.

I think these just have a NOx trap, separate to the DPF. (Like a little separate cat specifically for NOx). However the parts catalogue doesn't show a NOx sensor after it, so I'm not quite sure what's triggering that fault code.

DPF differential pressure at 0 is the obvious fault here though. That needs further investigation. Will only be one pressure pipe on these so if that's split then that would explain it. However, not getting a DPF Efficiency fault code suggests that maybe you're looking at the wrong parameter for DP pressure, and the correct one is changing as it should.

If the DPF is clogged with ash or soot then that will reduce power. They can't really be cleaned on this engine as both ends are bent over, so need to be cut open, by which point you might as well just replace it. If the clutch is slipping, that will also reduce power. That seems much more likely given the mileage.

2 hours ago, TomsFocus said:

Penso che questi abbiano semplicemente una trappola per NOx, separata dal DPF (come un piccolo catalizzatore separato specificamente per gli NOx). Tuttavia, il catalogo ricambi non mostra un sensore NOx a valle, quindi non sono del tutto sicuro di cosa stia causando quel codice di errore.

La pressione differenziale del DPF a 0 è ovviamente il problema principale. È necessario approfondire la questione. Su questi modelli è presente un solo tubo di pressione, quindi se questo è diviso, ciò spiegherebbe il problema. Tuttavia, il fatto di non ricevere un codice di errore relativo all'efficienza del DPF suggerisce che forse si sta considerando il parametro sbagliato per la pressione del DPF, mentre quello corretto varia come dovrebbe.

Se il filtro antiparticolato (DPF) è intasato da cenere o fuliggine, la potenza diminuirà. Su questo motore non è possibile pulirlo perché entrambe le estremità sono piegate, quindi è necessario aprirlo, e a quel punto conviene sostituirlo direttamente. Anche lo slittamento della frizione influirà sulla potenza. Quest'ultima ipotesi sembra molto più probabile, considerando il chilometraggio.

Guys, I don't understand what's going on. Magically, after driving it last night, the P2000 error disappeared without me resetting the ECU. This morning I double-checked for any leaks from the intercooler hoses but found nothing, and I replaced the plastic clip on the fuel line (the one with the tab you have to lift to pull the hose out). I'll check the new descriptions on Forscan. Since I'm Italian, I see the same parameters in two languages (Italian and English), and it looks like the English one actually works. I'll check back later.

This morning i have also used the Bardahl DPF Cleaner, but i have yet do full tank yesterday and now there are 3/4 of tank

I normally rated some additives (Archoil, the AdBlue anti- crystallisation if I ever need it) but DPF cleaners AFAIK only reduce the regen temperature slightly so don't fix any system issues.

If you come back with a fantastic improvement, that would be great!

As said above (I think) DPF pressure at zero makes no sense and needs investigating. It should be zero engine off, then we need figures at idle and 3000 rev/min for comparisons?

I will update.

I'm watching some video on youtube because i have found vapor oil or something like this, on the top of intercooler and it is longer as all the plastic piece. It's normal or can be a leak ?