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I have a 2013 hyundai elantra gt. The check eingine light came on and the codes read that it was between the crankshaft sensor and camshaft sensor. I have replaced both sensors and reset the computer and the car still won't crank. It sounds like it's trying to crank but won't turn over. The codes are still reading the same issue. I was told that it could be the fuel pump relay switch needsto be reset. Where is it located?

What exactly was the Diagnostic Trouble Code read?
Format in PXXXX. Such as P0440 is an evap system code.

No crank means the engine did not rotate.
Either the starter could not turn the engine or the engine just did not rotate
This would be a no crank, no start
Which is different from a crank, no start

One pertains to the starter system
The other to the running of the engine

Fuel pump switch location should be able to found in the owner's manual or call the dealer