Holy clean engine bay!

 

Definitely not mine, I would give a kidney to have that clean of a bay

 

Hey, that one's got ACE! Better see if you can get the owner's contact info for Triar.

 

Just wanted to see if you ever came up with a fix. I'm popping the same code on my DII. (P0440).

Is the best solution just buying a new valve? Or is there "something really cool I don't even know about?"

Did you try spraying it out like 04duxlr?