Hi Guys, maybe I didn't explain about how the cable saddle came into it very wel.
The mechanic I took the van to when the light came on has an auto electrician who diagnoses problems for them, he's mobile and works for a number of garages.
When the mechanic asked him about the alert code in my first post he said straight away that it was something to do with the cable saddle and it was around £100 for a replacement.
The AA guy said it was the knock or knox box, didn't hear him that well, he said he would clear the alert and to take it for a run down the motorway at 70 mph, this did sound like the dpf to me but he said it was the back box?
Surely if the dpf is blocking up then there would be loss of power and eventually put into limp mode to protect the engine?
It ran all day yesterday with no light coming on, it came on today during a rum to Glasgow down the motorway.
I don't want to damage my engine but I need the van for work or I don't earn and we all know how hard it's been the last six months.
If this sheds any light let me know?
Appreciate all the replies and advice.