Crankshaft Sensor

Does anyone know how hard it is to change the crankshaft sensor? My check engine light came on then went off several times last week, took it to Autozone to have it tested. They told me it was a crankshaft sensor. The part cost 17.95, but I'm not sure how to change it or were the buger is really located. Any suggestions?

I'd get the exact code and let's look at this closer, what year TB?

It is a 2002 TB. I have the part, but not sure how or where it needs to go. Someone said I may need a cherry picker to lift the motor to get to it.

Why are you doing this, btw the cps is lower l/s of block towards the rear.