Its strange i have an astra gte mk2 seems to run fine nothing wrong with it but the bloody engine warning light just wont go away. I took it to the garage they said they couldnt find anything wrong with it, so they plugged the little computer thing in to turn the light off. bang four days passed and the thing came back on, did same thing 3 times since and it still stays on. Is there something wrong with it or is the sensor just shagged? (in which case i'll take the bloody bulb out.) what is the management system checking any way?