TCM? Wiring Harnass?

At first there was a check engine light coming on, and it would spit the code P0715, but I cleaned up the sensor and put it back (yes, the pulse generator not the three prong. I accidentally changed the three prong and got laughed out of Mazda when I was told I am part of the 98% of people who buy the wrong sensor lol) and the check engine light went away, but now it will rough shift in-between 3-4 gear and the AT light will come on for a moment and then disappear.
The radio dash will also glitch. It has a little bit of rough idling, awful AWFUL gas. I'm talking like, half a tank will take you 30 miles and back and that's it. The oil is disappearing with no trace on my pavement.
Note - I bought this car after it had driver side front end damage (nothing too serious but enough to knock the light out and completely destroy the bottom airflow box) so I'm wondering if this is a wiring harness.
And how could I diagnose that? I don't really want to spend 200+ to go somewhere, where they wont really look. I have a multimeter, I did check the pulse generator and it was sending a resistance of 350. Not sure if that's a correct amount needed?