There is that track up Snowdon....

Bank A (driver's side RHD) sensor was a little oily, but there is a quite a lot of gunky oil around the bank B inlet (passengers' side RHD).

Not really going, sadly

lets hope that does solve it... ... - .- -.




Y. O. L. O.
.

As a further update on Martin's posts.
The area around the hoses from the MAP housing is oily and looks like they have been leaking slightly under pressure. The jubilee clips (other makes of clip are available) tightened up so this may have been contributing to the issue with a slight charge leak under full boost at altitude.
Nick has come up with a Tech Bulletin dated 5/10/10 that describes a similar fault code for extreme low temp -10C operation with a service instruction to reconfigure the PCM
I will talk to the dealer on Monday