From the Tech Support Archives: DTC P1297 in VW's with 1.8T

Pressure Loss Fault Code P1297 in VW's with 1.8 liter Turbo Engines

Fault code P1297 may be set if the car is driven under load or revved up and then returned to idle. Fuel mixtures may go lean as well. If these symptoms occur, check the pressure relief valve in the crankcase breather system. If the valve is NOT moving freely, you found the problem. Replace it.