etc.

Today I tried to diagnois a P0446 code that kept popping up. I tested all the VSVs and then the charcoal canister... all being with in spec of the FSM.

I decided to trace the hoses to be sure they were hooked up in the correct location. For whatever reason (luck?) I pinched the air inlet hose to find a very hard obstruction. Not knowing what it could be, I removed the hose and cut the section of the hose out. To my disbelief, I found a mass of charcoal that had found itself a home about a foot from the air cleaner.
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Would a clogged hose from the air filter to the charcoal canister cause a P0446 code? How about very poor gas mileage?

Also, what would cause the air inlet hose to become clogged with charcoal?

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If all is true, for the people battling an EVAP code, you may want to check your hoses for charcoal obstructions...