Need some hepl please.
 

My car was dying after warming up so I took it to auto-zone the code was

crankshaft sensor a

Auto-zone said there are two of them and Hyundia won't tell anything but bring it in so they can code it for $49.99 after I told them I have a code from auto-zone can anyone help me out?

So what car? What engine?

The Autozone guy is just a code reader, not a analyst. You should have written down the code number and then ask us the questions. Do you know what the code number was?