Got a 2017 Chieftain and pulled two codes, P1022 and P150C. I'm thinking this means the throttle position sensor failed, but no matter where a I look I can't find one to order. Any assistance would be appreciated

I have a 2016 Roadmaster and want to put a 21" wheel on the front. I like the TPS feature on the bike. So my questions are: 1) Is the TPS attached to the valve stem 2) Can I take it off of the old wheel and put it on the new one?