Corsa-B.uk - Vauxhall, Opel and Holden Corsa B Owners Club

Hi all , My daughter has a W reg Corsa 1.l with 59,000 miles on the clock and the engine management light comes on every now and again, the car runs ok but it has started to loose power now and then for just a few seconds and then clears its self.
I have changed the Crankshaft Angle sensor but this has made no difference, I have been asking around and the next part to change would be the Camshaft Angle sensor . I am wondering if any body has had the same problems as we have and any suggestions on how to clear this problem.
Many thanks John.

Read the codes 1st bud, (if there are any stored) At a guess it sounds like air flow meter heat wire covered it poo, but get the codes read and go from there.