the boost reference tube gets filtered air from the intake side. its unlikely to be plugged up. but there is a real possibility of a rust hole. mechanical damage is unlikely unless someone has been doing work on the engine in that specific area. but even then those tube are usually pretty robust and would take a heck of impact to kink it.
"the boost reference tube gets filtered air from the intake side. its unlikely to be plugged up"
I have seen a couple of cases where the turbo shaft seals were losing oil a bit and also where the engine blowby was routed back into the air cleaner allowing some 'slop' of oil and water to enter the tube area.
YMMV