ok, determined not to let this thread end without a successful result, I am reporting back.

I had all error's cleared this morning. Drove it, still no boost. The car detects this fault straight away more or less from take off as i did not even hear or feel anything that could remotely be related to the SC or clutch kicking in.
The only fault the computer picked up was that same error with the wiring positive circuit, something or other.

So guys... help please. Where do I go from here?