OK, a bit of history first. I bought the car as overheated, needed a head gasket and a skim. Not sure why it overheated previously but I have never seen the cooling fan working even when the engine temp gauge was in the red.
Anyway, got it all running and plugged in the INPA, it's not sensing the ignition being switched on and only communicates with the engine, can't see what the body or chassis are doing, can't find out why the airbag light is on etc.
I've seen this once before on an e46, there was a failed sensor on the auto box which stopped communication with everything, but this time I can look at the engine but nothing else.