Hi, my engine management light comes on whilst driving maybe once a week. Then goes off after I restart car. I have had the camshaft sensor replaced as this is what the fault code was signalling. However, the light still comes on but not so often as before. I have had many different diagnosis from garages /mechanics (without seeing the car). I have been advised to get the serpentine belt changed, timing chain slipping, wiring fault or sensor is misplaced. Can anyone shed any light without me having to spend a fortune please? It is a vvt-i petrol engine. Thank you