2001 Elantra, Auto

I recently checked ODB codes since my tranny was very sluggish, seems like it stays in 3rd. When I shift manually to 1st and 2nd it works but when in drive it doesnt.

P0709 Trans range sensor intermittent.
Did some research and I believe it may be the neutral safety switch, correct me if Im wrong !! I need help to find where the switch is located or how to fix this issue.

P2318 Ignition coil G Primary circuit low. I beleive the issue is the coil packs. How could I test to narrow it down??

P0019 Crankshaft position/camshaft position sensor.
Where is the sensor located and how to fix ??


Could it be possible that the issue could be a ground or an Issue with the Tranny control Module ??

Any help is greatly appreciated !!!
Thanks