I've had my 2.2 DTi for about 2.5 years now and there has been the odd niggle (overboosting while towing...turned the actuator rod and cured it) but it has started to come up with the car/spanner light when starting.....sometimes.
If I were to start it now it would come on but then go off after driving a few yards. If I then shut the engine off and start it again it won't come on. However if I leave it an hour or so and then start it, the light will come on again and again go out after driving it.
It only goes off after I have driven a bit. There are no abs or tc lights on. The only thing I have noticed is that the screen seems to be dimming more than normal when turning the steering, possible alternator?