A couple of things:

Firstly, it was quite a few posts before you mentioned you're running it on LPG. Does it do the same if you leave it on Petrol?

Secondly, did you notice that the air intake temperature is showing a negative value in the error report you posted? The fuel mixture will definitely be corrected for cold air running; it will be made richer since cold air has higher density. Perhaps the air inlet temperature sensor needs replacing.

Hi there. The temp thing was something im beginning to think about. I get the error on both petrol and lpg, and always on both banks reporting rich. To me that suggests a common component to both fuels and both banks (and rules out leaking injectors or o2 sensors)

I did notice last night when it threw another error it was a negative value. Will look into it a bit more.

I was logging the car on a run last night... the fuel trims seemed very stable, then they suddenly they start changing and it throws the errors ... with the system I was using, I couln't log the air intake temp at the same time. Will see if i can do that and see if there is a correlation.

This is an example of the trims suddenly changing ...

Time bank 1 bank 2
00:13:44.07 -1.31 -1.45
00:13:45.09 -1.31 -1.45
00:13:47.01 -1.31 -1.45
00:13:48.03 -1.31 -1.45
00:13:49.05 -1.31 -1.45
00:13:50.07 -1.31 -1.45
00:13:51.09 -1.31 -1.45
00:13:53.02 -1.31 -1.45
00:13:54.04 -1.36 -1.45
00:13:55.06 -1.4 -1.49
00:13:56.08 -1.45 -1.59
00:13:58.00 -1.54 -1.63
00:13:59.02 -1.59 -1.72
00:14:00.04 -1.63 -1.77 < engine light comes on about here...
00:14:01.06 -1.63 -1.77 V8 or else ...

Any updates on this?

Fraser