what does error code P0224 mean?

evap emission system leak detection pump control circuit high.
Upper limit value exceeded?

Anyone seen this before?

 

I recall TT surgeon telling me a while back something about a purge valve problem which is to do with this evap. Part of the emmissions system and the valve sticks or gets blocked or something. PM him and ask. I know he had his fixed by the dealer.

 

thanks mate