Hi. need help. Trying to understand issue.

my daughter had a severe curb scrap...chipping a chuck of the rim and tire off, as well as, throwing the alignment off. A week or so later after no driving a lot, after stopping to gas station, her a hard noise when turning the wheel and noticed the car was in limp mode. no park or mode on display. stopped for a moment and turned car off. No limp mode. drove ok until next day. limp mode. intermediate bouts until finally its stuck completely in mode now. But before, got a diagnostic and said bad shifter. 1100.00 dollars. although he said check engine light when off when he drove around corners and no problems with him. As soon as i got back in, limp mode. turn off then for a few and normal. now limp mode forever....