Had to change the sensor. That was a pretty penny. I put the scanner on again today and was still reading the codes after I'd cleared them, and only read like 2psi less backpressure, I unplugged the sensor and it stuck at 43 psi (obviously, it was unplugged) and plugged it back in and it read almost the same. I called up the dealership and they said it was indeed a common problem, changed it and HOPEFULLY the codes will go away and stay away, I'll check tomorrow when I have the scanner again...