Whats you style of driving? how many miles a day? whats the driving duration?
If VW Assist done a static regeneration, thats implying that you are not driving enough for the van to complete its own DPF Regen cycle?
anyhow the PO401 may be EGR valve related - or blocked,
There were more issues with the EU5 T5/T5,1 engine than the EU6 T6 engines in regards to EGR valves (i had one done on our EU5 T5.1 180).
maybe check the below about completing the regen, also note the van will normally do two regens per tank of fuel, (1/3 & 2/3 tank mark roughly) and that having a low level in the tank all the time will stop the regen proces so make sure you fill it up.
Maybe take the van in to the dealer for the EGR valve fault and possible replacement.
P0401 possible egr valve fault
How to reset/regenerate/clear your DPF warning light (Diesel Particulate Filter)
Hi thanks for reply
Yes if van not doing long enough runs then it will block up but not at 15.000 miles
If VW state that it’s down to customers driving
Then why when you buy the van are you not WARNED that little use will result in possibilities
Of engine issues .??
This won’t hold water in a court of law as I don’t believe any T5 or T6 buyer
as been warned not to do short trips you buy a vehicle to use VW ASSISTANCE
Just tool me he been to vans doing motorway miles daily of 200-400 miles and still got issues
With EGR faults same
So why do EGR FLUSHING why not solve the issue and redesign part anyway van going in tomorrow
To see Dr. It also got a extra prescription for faulty battery that VW have fitted from new
MOLL batteries between years 2016-18 if your having starting issue please check with VW FOR CORRECT DATEcode thanks for all your input glad folk are keeping up to date with faults
Other wise VWwill just ride out our warranty and then your at mercy of paying dealer prices
Thanks again Roy xx