Possible causes

– Engine oil dirty
– Incorrect engine viscosity
– Crankshaft position sensor circuit is open or shorted
– Camshaft position sensor circuit is open or shorted
– Faulty crankshaft position sensor
– Faulty camshaft position sensor
– Timing gear misalign

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)

P0016 JEEP Description

The Powertrain Control Module (PCM) detects that the deviation between the cam and crankshaft position has exceeded the maximum acceptable value