I have a 55 plate focus 1.8 TDCi For the past week my Engine Systems Light has been coming on whilst I'm driving. If i switch engine off and back on, The light goes out. Only to come back on within the next 24 hours??? Car seems fine, no loss of power. I know i need a new battery and back pads, So i dont know if they can be the cause. I have to jump car most days. But i'm gonna pick a battery up tomo. Any ideas?? Cheers.