Looking through the owners manual the other day and I notice that it has a boost psi sensor filter. I've never seen or heard of this on a diesel and I've seen a few. My only conclusion is that there is something in the intake tract that will plug or contaminate the sensor. Think I will reconsider ccv filter.

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2005 sport crd-SOLD No regrets

I see in the maintenance manual that it is check and replaced as needed at every oil change. You can see it near the right fender under the hood.

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2006 Black Jeep Liberty CRD Limited
K&N, Samco Hoses, Michelin 245/70-16 LTX A/T2, Fumoto F-102, V-Force Muffler, Mopar, Hitch, Trailer Wiring, Skid Plates, Slush Mats, Rear Shelf, Predator Stage 1, Transgo, ORM & CodeReader, Facet 40109 Pump
"IT'S A DIESEL THING, YOU WOULDN'T UNDERSTAND"
Certified Services Auto & Truck Repair