this can be a number of things...
My own car has the same DTC which Im still trying to trace but only happens (seams to happen) in damp weather and on a sunday? I've carryed out alot of diag changed 02 sensors tryed AFM with on hope.
talking to the master tech a skoda and dub the first thing is to change both oxygen sensors which work out to be £90 each
if this does not fix the problem there is an air leak after the AFM (air mass meter) which could be anywhere, most common on the AUM engine is the vaccum pipes and sensors under the inlet manifold and to the fuel pressure reg, if NFF Then you'll be start changing gaskets and pipes till the correct componant is found.
I know this is'nt aload of help but its just were to start as im still trying to get the fault to happen again after ive changed/ adjusted a couple of bits.
Mike