Replaced the crankshaft position sensor but my car still won't start.

The other day my cel came on, so I took my car to
orielys to have it checked. They had the same code
pop up three times. All were my crankshaft
position sensor went out. So the next day I went to
go start the car and it wouldn't start(Engine revved
but wouldn't fully turn over, also was making a
ticking sound). So I had it towed to midas and the
sensor replaced. But it still won't start. But the
ticking noise stopped when I try to start it now.
What else could be wrong?