Engine Motor Control System Failure??
Just got home from being out in my 147 today and whilst being on the road, the yellow warning light (engine symbol) came on with the warning "Motor Control System Failure". After looking this up in the owner's manual, I realised that this meant that there was a possible fault in the supply / ignition system which could cause high emissions at the exhaust, possible lack of performance, poor handling and high consumption levels.
Firstly I'd like to know how serious this problem means for the performance of the car and the risk involved in leaving it for a little while.
Secondly I'd like to know if this problem would be covered under warranty (I am currently covered with the AA). If not, how much would I be looking at spending to correct it?