Hey all, my car ('06 R53) threw a check engine light and it's a P1237 code, which leads me to suspect a vacuum leak or the sensor itself randomly went, but I blame myself for this one: it went suspiciously right after I was a bit... aggressive on some icy back roads. It was not only cold out, but I was bad and didn't let the engine warm up enough either so I'm thinking some rubber hose or something ripped, maybe? Besides the CEL, the power is pretty weak so I assume there's air that she needs to breathe and isn't getting it.

Here's what I found under the hood (we're looking just between the cold air intake to the top right and the (not shown) engine block / supercharger to the left)



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Immediately notice that there's the big pipe that goes from the CAI into the engine and it has a nipple that's just open on the left side (the blue circled area in the picture) and a hose that goes into the top right of the engine near the spark plugs and that filler cap - should these be connected? They seem awfully close and matching not to be. They're pretty dusty, so I don't think they've come undone recently.

Also found this really thin tube in the same area:



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Which sucks in air when the engine is running and seems to trigger the bypass valve opening and closing. I assume it's some sort of vacuum line that controls the valve? Where does it plug into? Tried looking up diagrams and videos all day to no avail.

Thanks in advance, I hope this is the right area of the forum for this.