My check engine light came on in my 1998 Aucra EL 1.6, I did an OBD scan and I got codes P1336 P1337. I've gathered that this is my Crankshaft Position Sensor, if I replace this, can I do a Crankshaft Position system variation learning procedure myself? Or does it even need to be done?

I would simply replace the Crankshaft Position Sensor--that should take care of it.