Two More Questions: RF position sensor, short to ground?

Since my wife has my car, with the exact code. I can remember that it has something to do with the RF position sensor, short to ground. How does one actually get to this sensor and is this just a ground gone bad?


Second question is on a PO-56 code. Transmission input speed sensor. Would this sensor cause a vehicle to act a little kooky once it shifts into 3rd gear?
Anyone know where this is, and how it's connected? It's a pretty cheap part, so I may as well change it.

thanks in advance!