However, I do find it interesting that the "Multiscan" interpretaion of the P0170 seems credible given the history.

As for the P1608, My main gripe here isnt with multiscan, Its with Autodata! As I said, the Citroen is not in any way an unusual vehicle, Failing to provide this data is an outrage!

As it stands, I am reasonably happy from your responses that there are no deeper mysteries on this vehicle. I will report further once I have completed the work already outlined (which I wont be doing for a week or two)

Cheers