Not enough info to answer that one. Give us more info and re-post.
In the top of the valve cover , on the drivers side of the engine , near the rear of the valve cover , next to the firewall
as you are standing at the front of the car, it is at the left rear corner of the valve cover, next to the distributor, under a small hose that leads from the valve cover
This will depend on the engine size. If it's a 3.0L then it's location in the right rear valve cover next to the firewall. All others have it in the left front valve cover.
The PCV valve on my 2005 Pilot is bolted horizontally into the side of the valve cover right next to where the oil dipstick is.
its right next to the valve cover on the driver side behind the coolant sensor
Right next to where you put in the oil (Gasket Cover)
remove the "dog bone" engine mount. then the 2 upper 10mm bolts on the timing belt cover. this will allow you to pull the harness out of the way to remove the cover.
next to left side diverter valve right under it. Its a y hose and the pcv valve is under a rubber cover.
The EGr is located next to the fire wall, next to the valve cover on the drivers side of te engine. good luck
the PCV valve will be lacated in the valve cover next to the firewall. It will be in the top of the valve cover and have a rubber vacume hose leading under the upper manifold to a port on the intake manifold
If you have done a compression check the next step is to take off valve cover and look.
the PVC vlave is located in a hole on the top of the valve cover next to the oil fill cap.