not really... i'm not clear if youre saying that that it SHOULD at idle. ie if its TRYING to run lambda 1 at idle or not. cozif it is supposed to be, and it aint, then there's a problem yeah? but if its not trying to then its nothing to be alarmed about... yeah?

i was initially concerned about my cars poor performance and fuel guzzling alility (200miles to a tank) but on the journey to fordsport and back (which was 99% cruise at sensible speed) it returned very good mpg, so now i'm not sure if theres a problem or not.

the car is booked in to be looked at, but if there's a fault and it requires replacement parts its unlikely it can be fixed same-day so i figure anything i can check myself with mr. multimeter and mr. fault code reader i may aswell do before going up.