For a 2002 Mitsubishi Mirage de coupe, 1.5l automatic. Transmission problems.?

I m an idiot and left the transmission speed sensor unplugged after working on the car, started it up and drove around for a bit and the transmission now refuses to shift out of first gear under 40mph and to get out of 2nd, 55mph. I ve since then plugged the piece back in and still drives broken haha. If this can help me narrow down what kind of damage I ve done to the transmission, I could possibly repair it. Maybe I ve trashed the whole transmission, maybe I just need to replace the shift solenoid. Fluid levels are fine.

thebax20062019-05-07T11:29:25Z

If the "D" or "N" shift indicator light is flashing you have an electrical control problem with the tranny. You need a mechanics scan tool to read the transmission codes. A bad input or output speed sensor can cause your problem.
Read the tranny codes and then erase them. You might get lucky and only need to erase the codes.