Hyundai Repair: Codes p0705, p0115, coolant temperature sensor, poor fuel economy

Question
My check engine light has been popping on and off for about a month now. I took it to the local auto parts store and had them scan the codes. p0115 for the ECT and p0705 for the for the trans range sensor showed. How big are these problems and are they costly to fix? Also I had to replace the input speed sensor on the trans not too long ago and had to remove the TR switch. Is it possible that I just didn't adjust it right when I reinstalled it?

Answer
P0705 can indeed be caused by a misadjusted range switch.  

P0115 is typically caused by the coolant temperature sensor.

Neither adjusting the range switch nor replacing the coolant temperature sensor is a costly repair.  The coolant temperature sensor issue can cause poor fuel economy and hard starting.  The range switch can cause the engine to not crank when the key is turned and can cause abnormal transmission operation.