Toyota Repair: Oil Buildup in Air Intake Manifold, PCV, valve

Question
I have a 2004 Toyota Sienna, 2WD, 3.3L engine. There is a build-up oil in the Air Intake Manifold and Mass Air Flow chamber. The check engine and VSC Trac OFF lights are on. Is there suppose to be a valve that keeps the oil from transfering into the air manifols or chambers.

Answer
Your PCV (Positive Crankcase Ventilation) valve may be staying stuck open.  Replace the PCV valve.
If that doesn't resolve your issue then it appears that your PCV valve is doing its job.  You have excessive pressure in you crankcase and it is being vented back to you intake.
When the engine is running pull out the oil dipstick and place your hand by it.  Do you feel pressure blowing out?  Place the dipstick back.  Loosen the oil fill cap and place your hand there.  Do you feel pressure?
This excess pressure is coming from combustion gases blowing past the rings on your pistons.  This is not good.  Are you burning oil?  How many miles are on this engine?  Is the rest of the vehicle in good shape?  You may want to consider rebuilding / replacing the engine.

Hope this helps.

Vince