crankshaft sensor is located in the right back side looking at the engine from the front . it only has one e8 torx screw if u look in the back right side next to transmisson n engine. To make sure that is the problem if u dont have a scanner simply unplug it n replug it n ur check engine light will turn off thats only if ur check engine light is on the reason ur check engine light will turn off its becuase the sensor is not hot.next jus get new sensor. unscrew old one unplug it put new sensor rescrew it and replug it to the new one ur CF will b ready to ride easy fix hopes this helps .