2001 Honda Odyssey

Hello, I have a 2001 Honda Odyssey. In July I replaced the 2nd gear shift sensor, the transmission range switch and the EGR valve as well as cleaning all to the carbon build up from the manifold and the EGR port. My van had been running really well until about a week ago. Now I am having trouble with my transmission shifting.  I am able to back up with no issue but when I put it in to drive it sits for a bit before it will shift into drive. I can feel when it does shift and I know I can go. But then as I drive it will jerk a bit and then run smooth. If I have to slow down or stop and then accelerate again it will hesitate before going into gear. I can push the gas and the RPMs will go up and then shift hard into gear. My check engine light is on and the TCS light comes on and off. It is throwing the code P0705 that I had a short in the Transmission Range Switch. When I replaced this part in July I did replace it with a used part as I could not afford a new one. Will this cause issues with the transmission while driving or only when selecting gears? If I replace with a brand new part might it fix the problem?