hey so i was driving and i went up a road and there was a huge puddle of water i couldnt avoid as soon as i went there my speed was messing up like it was going up and down randomly and now it doesnt move from 0 the check engine came on but as soon as i shut off the car the check engine light went away any ideas?

 

check the speedo plug for water.

 

MM&Y of car would help, but I agree, most likely VSS plug. 94