I had the same issue, posted about it.
1st time the part was replaced under warranty, second and subsequent times, I've removed, cleaned it with CRC Electronics Cleaner, installed a small gas engine fuel filter onto the atmospheric vent line. Drove it for awhile over 6000 rpms (some say 3000, but that did not work for me, but 6K did).
When the code occurred again, I'd remove it, clean out the dirt with the electronics cleaner and reinstall.
My last repair, I replaced it with the following part as I did not want to pay about $200 for a new Polaris part.
2007 SAAB 9-3 Replacement REPS963601 Turbo Boost Pressure Valve ($23.23).
The part appears, externally, to be the same, however I don't know if the operational specifications are the same or not, but for $23; it's worth trying.
If it doesn't work, I'll buy the Polaris part.
I have received a 1127 code on my rzr. It's coming from my boost pressure sensor, according to the service manual. Additionally, it references a P0234 code for my occurance under the DTC column. Can anyone tell me what might be the cause of this problem? Thanks in advance for your help.