The Crankshaft position sensor (CKP) indicates the timing of the crankshaft or its position to the Powertrain Control Module (PCM). This information is used in the engine RPM.
On the other hand, the Camshaft Position Sensor (CMP) indicates to the PCM the position in which the camshaft is located.
If in one of these two circuits the voltage drops below the level set by the manufacturer, the diagnostic code P0322 OBDII is stored.