DTC P0339 - Crankshaft Position Sensor A Circuit Intermittent

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P0339 - CRANKSHAFT POSITION SENSOR A CIRCUIT INTERMITTENT

Description:	This DTC sets when several erratic profile ignition pickup (PIP) pulses have occurred in the crankshaft position (CKP) sensor signal within a calibrated time period when the camshaft speed exceeds the equivalent speed of engine idle or the starter motor is engaged.
Possible Causes:	CKP+ circuit intermittent open (VR type) CKP- circuit intermittent open (VR type) CKP circuit intermittent open (Hall effect type) VREF circuit intermittent open (Hall effect type) SIGRTN circuit intermittent open (Hall effect type) CKP+ circuit intermittent short to voltage (VR type) CKP- circuit intermittent short to voltage (VR type) CKP circuit intermittent short to voltage (Hall effect type) VREF circuit intermittent short to voltage (Hall effect type) SIGRTN circuit intermittent short to voltage (Hall effect type) CKP+ circuit intermittent short to ground (VR type) CKP- circuit intermittent short to ground (VR type) CKP circuit intermittent short to ground (Hall effect type) VREF circuit intermittent short to ground (Hall effect type) SIGRTN circuit intermittent short to ground (Hall effect type) CKP sensor incorrectly installed Damaged CKP sensor Incorrect, damaged or corroded connections Arcing secondary ignition components (coil, wires and plugs) Arcing relays or other high current devices (cooling fan or starter motor) On board 2 way radio transceiver Radio frequency interference or electromagnetic interference from an external source Incorrectly grounded high power aftermarket equipment
Diagnostic Aids:
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
All	GO to PINPOINT TEST JD .