Just notice whilst driving to work this morning that the MPG reading kepted jumping up and down, ranging from 20s - 120!! Sometimes the reading goes blank and displays --- (3 lines). And this is happening at whatever speed I'm travelling at. Never really looked at the MPG reading before as I have the display on fuel remaining. Can this be the reason why my warning lamp came on for the engine management?! Anyone any idea the cost to sort this out, so i have a rough idea what has to be done. CHeers!