I have a '02 Opel Corsa and recently the yellow engine management light has been on constantly. I brought it back to the garage I got it from (still under warranty) and they replaced an oxygen sensor. I picked the car up today and before I'd even driven it out of the garage the light was on again. They said after they did the job they forgot to 'cancel' the computer. They did this and the light went off, and was fine all the way home.
I just took it out a few minutes ago and the light is back on again. I have my driving test in three days and I wont be allowed to sit it if there's a warning light on.
I'm really worried as the garage dont seem to have a clue whats wrong with it, but its under warranty there and I dont want to spend a fortune on repairs somewhere else.
Any idea how I can get this light to switch off? I'm desperate!