WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Crankshaft Position Sensor
Courtesy of CHRYSLER GROUP, LLC
The Crankshaft Position Sensor (CKP) is attached at the left side front of the engine next to the crankshaft damper.