When Monitored
WARNING: This page is about a different car, the 2015 RAM 3500 HD and 2015 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
While engine is running. The Powertrain Control Module (PCM) monitors the position of the notch on the crankshaft speed sensor target and the camshaft speed sensor target. If the two positions do not match, the PCM then determines that there is a mechanical mis-alignment between the two sensors.