Evenin all. Ok so I know the DIS is not that accurate but the average figure is on a downward trend from just over a constant 34 down to 32 and still slowly dropping. This is confirmed by me doing the same journeys every week with same driving style and having to fuel up a day earlier than normal. I scanned it the other week and got 'Lambda no activity intermittent'. I took the sparks out for a check and they seem fine with less than 10k on them. Is it likely to be a failing Lamda or could that code be thrown up by something else? Thanks for any help as always Si.