OK.. so I've now turned the stupid part of my brain off!
The above refer to ECU 1 or 2, you have to delve elsewhere on the i930 to find which codes each of those have had!
I've had:
P0460: Fuel Level Sensor Circuit Malfunction
P242D: Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 3
P22D5: Manifold Absolute Pressure/Barometric Pressure Circuit High Input
The car had been sat idling for 10mins having been stood for 3 1/2 hours.
I've done 6 starts and ~ 60 miles since and had no recurrences.
Will try to remember to check for any new codes after the 280 miles journey I have tomorrow.
Thanks for making look properly Phil!
I must say though.. I was rather horrified at the long list of other codes that I found that hadn't triggered any warnings!!
