Interesting post.
As originator of the main P0401 post and having worked with 'theoneandonly' on analyzing live data I've now a great appreciation of our possible problems that we've inherited from Fiat.
I only travel the UK , my must have is a laptop with
Multiecuscan installed and charged up. I had my LP EGR cooler changed a year back and it was my eureka moment watching live data of the LP EGR opening and adjusting variably and seeing the effect on the LP EGR temperature. Thanks to
MES after fitting my new cooler.
I know the MAP will clog again so I hold a new one, we know the turbo solenoids last only 24,000 miles ish, I need to buy one. On coolers I have a new one plus I've cleaned my old one. I have a spare HP EGR (cleaned); I know how to clean them so wouldn't buy another. I'm toying with buying a s/h LP EGR as I would like to try one just loose in the engine compartment plugged in and seeing if it would operate without causing error codes thus stopping the soot entering the turbo. I have a new cam sensor and MAF ready for a rainy day.
I would like a DPF new but the price....
My van is very very special design, (I designed and built it), I don't have an option to p/ex for a replacement so mine is here for the long term.
Bearing in mind the horrendous problems of Boxers / Relay with Adblue we actually have a good basis for the future.
Lastly I know my DPF is cracked because of tailpipe soot, I'm just wondering how long I have before the new cooler blocks....