To find it, you'll need to consult a repair manual specific to your Jeep Liberty's year and engine. A Haynes or Chilton manual, or a digital version from a reputable source like AllDataDIY, will show you a diagram and the exact location.
Generally, the CKP sensor is located somewhere near the crankshaft pulley, often on the engine block near the transmission bellhousing. It might be on the passenger or driver's side, depending on the engine.
Without knowing your specific Jeep Liberty's year and engine, giving a precise location is impossible and could lead to incorrect information. Using a repair manual is crucial for accurate identification.