What is the most common fix for code P0321 in a volkswagen beetle

Question

Vehicle engine turns over and attempts to start but stops running after only a couple seconds.

Answer 1

P0321 Ignition distributor engine speed input circuit range performance

P0411 Secondary air injection system incorrect flow detected

P0455 Evaporative emission system leak detected,(large leak)

P0321 is the engine speed or RPM sensor ,if this signal fails the engine will stall.The secondary air injection if the air injection tube is disconnected you can get this code, but more than likley its a failed secondary air injection.As for the EVAP leak inspect a the fuel cap, listed in diagram is RPM sensor