Did a quick Google and it seems that other K04 upgraded cars experience the same DTC. Here for example:
Thanks Mike - me and Doug googled it yesterday and found what you found - I was more after a proper techy explanation as to what might cause the "killer code"!!!
(PS. Is this another excuse for getting your torque graph out?)

Nah - I think I've lost my graphs from the RR day already! Unless by "torque graph" you mean my knob, in which case I don't need any excuse to get
that out ...
It'll be sorted Julian, sorry about the inconvenient!!! I know exactly what causes it, just ran out of time the last time you came down!!!

PHEW! Thank f*ck for that Mihnea!!! Was getting somewhat disconcerting and causing a fair degree of anxiety every time I needed to change into 5th or 6th - didn't know whether the thing would die or not! Thanks!
