Car won't start could that be the crank sensor?

It could, but then, it could be a lot of other things as well. Don't replace parts just hoping that you'll solve the problem.

First, run a diagnostic scan. See if the computer knows anything. If that doesn't give you anything valuable, try using a little starting fluid to see if the engine will start briefly that way.

If it has a crank sensor then it must be computer controlled, and the computer knows more about what's going on than you could, just by guessing.

Seriously, don't just throw parts at the problem, since everything you touch introduces the potential that something didn't get put back just right.

If it was running before and now it's not, you typically only have one major problem that caused the failure. Find out what that is before you throw parts at it.