SO - I have a JLT - it only deals with the the dirty side - and its crapola. I have been looking at replacement of it with UPR like yours, so I was watching one of this groups favorite Ford mechanics TY channels,
Some thoughts since I dont have your dual port CC. Your bi-pass valves facing the wrong way? Are they possibly not working? Is there a leak around anything you drilled to make it fit?
I got it once but after I installed a CAI. It never came back. I also have a catch can on the dirty side but never got a P04DB for that. FYI, I looked at the Magnum FORCE Cold Air Intake System Replacement Vent Tube Insert Part Number: 59-06201 as others claim it fixes the P04DB code thrown because of CAI's. Here's one thread on it. https://www.fusionsportforums.com/threads/help-oreo.20202/