So tonight i was on the parkway moving at around 70-75 mph. The check engine light kicked on and the D4 shift light started flashing. I got off the parkway and turned the car off and back on and the D4 light flashing went away, check engine light is still on. The trans shifts fine but when i get up around 30ish mph there is a constant clicking sound. The fluid was a little low but not off the stick and i topped it off. Could i have blown or damaged the trans here? Or what could have caused this? Thanks in advance.

 

Under glovebox door, two wire blue connector. Jump it with a wire. Turn key to II(ON), retrieve codes from CEL and D4 lights. Report back.