Re: Engine warning light
Mines been on and off (phase II) and its a simple common problem usually: Sensors.
1st question is does the car have flat spots in revs (around 2-3rpm) and if so its most likely your MAF (you can clean it using the forum's guide or splash out on a new one)
if its not that the 2nd option is that its a lamda sensor in the exhaust. Both are easy to replace and its not to freak over.
My light is currently on again, after a few on/offs - so dont worry. Yet do get it seen to, I'd suggest getting a computer stuck on it.