Hi, I have 58 plate petrol astra, has broken down 3 times in last month. Engine cuts out and will not start. Service light, battery and engine lights come on. Diagnosis shows either nothing, fault code for cam shaft sensor, or number of unrelated faults. When faults are cleared car will restart. Vauxhall could not sort it, now at Halfords but they don't know., Losing all faith with vauxhall. Anyone have any ideas?