Follow the thread I gave to verify condition of spark plugs and coils. If you ever find oil in the tunnels you can think of the PCV later. Just clean the oil on the coils, spark plugs and tunnels if it is the case.
If you want to test your PCV you can put a glove over the oil filler hole and with the engine running if it is drawn in you have a working PCV. If it blows up (inflate) then have a look at your PCV.
Here is a picture of a working PCV.







