After talking to Daniel (aka "Volant1" above), it sounds as though my o-ring that came with my kit is most likely the culprit to my codes. Daniel is sending me out some new stuff that should solve the code issues.
If you are having problems with your '09+ and Volant, or if you're considering one but are concerned that you, too, might have code issues, just drop Daniel an email through the Volant site (or PM him from here). He called me at the number I PM'ed him and we went over my set up and concerns. Really nice guy, and will go out of his way to help you. It's obvious that he wants his customers to be happy -- and for his products to work well for his customers.
Daniel, fi you're reading this (and I know that you are), thanks again for your help!