hi i had trouble with my vectra cdti 150 the problem i had was a slight hiccup when driving this has been going on since i bought the car 4 months ago, ever since i have had the car when i start it up there was no spanner light on but this week the spanner light has started to illuminate when i put the ignition on and go off when i start it and since this has started to happen the car runs perfect, it sounds strange but true can anybody shed any light on why this would be cheers. i changed my fuel filter last week so was not sure if i had water in the diesel because the handbook says if the spanner comes on whilst driving it means there is water in the filter could this of caused my car to hiccup and miss cheers.