As someone who's been through the mill with a blocked DPF, I would suggest the last thing you want to be doing is a forced regeneration, particularly if it is blocked already - you risk overheating and completely ruining the DPF.
You need to find out WHY the DPF is blocking - it is a
symptom not a cause. It could be something as straightforward as a faulty pressure sensor or, worse case (as I found out) a complete turbo failure.
When the DPF light comes on, the advice is just to take the van for a good drive. The Fiats seem to use a very odd method to decide when to regen (the % blockage is just an arbitrary time/mileage percentage, and not related in any way to the amount of soot which needs burning off).
In normal circumstances you wouldn't notice the Doblo doing regens, as they do a lot of passive ones when you're driving about. If you're doing a lot of short journeys then the van won't do these passive regens but it will need to do an active regen (this is where it forces fuel into the DPF to increase the temperature to 620 degrees C to burn off the soot). If it doesn't get a chance to do this, it will throw a P1206-22 code first (a generic OBD reader will see this as P2002), which means 1st stage of blocking has been reached, then it weill throw a P2002-22 code, which means 2nd level blocking.
Did you get any engine management light and/or codes ?
It's a shame you're not closer to me, as I would happily have come round with my scan tool and
MultiECUScan to see if we can get to the bottom of it.
If you have a crappy OBD bluetooth adapter, it might be worthwhile downloading the Fiat Alfa DPF app from the Play Store and paying the couple of quid for the Pro access - that'll tell you the % blocking (even though it's an arbritary figure) and give you an idea of what the temperature of the DPF is. More importantly, however, it gives you the differential pressure, which is the key reading the Dolbo uses to determine whether to regenerate.
The app is at
https://play.google.com/store/apps/details?id=com.kapron.ap.dpfmonitor&hl=en_GB
You can see where I was having problems in my journey with my recently acquired 1.3 at
https://www.fiatforum.com/threads/2...dpf-related-shenanigans-1-3-multijet2.513342/
The other thing worth considering is paying £90 for a DPF assessment at a DPF Doctor place - they're actually based in Ashington so hopefully not too far from you. The good thing about this is that they can find out what's wrong
first rather than someone who doesn't have experience with DPFs and who will probably end up throwing parts at it and doing totally the wrong thing to fix it. You're not obligated to go any further with these guys. I used the Nottingham one - never needed the DPF cleaning as they found the root cause through proper diagnostics. It's these guys
The DPF Doctor is the leading network of DPF cleaning & repair specialists. With our industry leading DPF Assessments we aim for a first-time fix every time.
www.the-dpf-doctor.com
