Crankshaft Positive.
A electronic device used in an internal combustion engine to monitor the position or rotational speed of the crankshaft while this information is used by engine management systems to control the fuel injection or the ignition system timing and other engine parameters.

Crankshaft Position Sensor
A failed crankshaft position sensor will often cause your Volvo to crank without starting or may cause it to die intermittently. If your check engine light is on as a result, our technicians can diagnose and repair the problem.