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.