Just an update - on reflection overnight I decided to remove the spacer on the left bank thinking about what the sensor actually does. I also thought to swap
left with right ( Brett at BHM suggested this too) but the left is much shorter than the right so won't reach the connector. I also noticed that the connector plug on the left bank is green whereas the righthand side is blue. So far I have not discovered the reason for this. The sensors themselves are different lengths with the left being shorter than the right. I tried to post a photo but although small I keep being told its over 1000. TANT PIS.
