Where the 2 earth wires leave the post heating relays (green brown) they are spliced into a white, then into a green with yellow tracer. At this point was a bad conection! Now no fault codes and regen done/
autoden
Anyone shed some light on the above i found this on a web search regarding the blocked filter message where is the post heating relays located in the engine Bay ?
Thinking outside of the box is better than sitting in a dark one.