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P1391 Diagnostic Trouble Code Discussion for September 2009

CKP Or CMP Sensor Signal Intermittent

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Trouble Ticket Help Requests for DTC P1391
Help Request Posted
1996 Dodge Grand Caravan SE 3.3L Hesitation, Surge, Misfire VIN: 1P4GP44R6T
P1391: CKP Or CMP Sensor Signal Intermittent. Problem is very intermittent. Customer can drive up to 140 miles with no symptoms or MIL coming on. The flex plate was also checked for cracks. Car starts to act up, bucking surging etc right before MIL comes on. No other DTC's.
September 15, 2009
2000 Dodge Intrepid 2.7L No Start, MIL Lamp on VIN: 2B3HD46R3Y
P1391: CKP Or CMP Sensor Signal Intermittent. car was towed in no start, cranks over fine.changed cam and crank sensors. still no start,unplugged cam sensor and it starts. checked reference voltage to sensors,have about 8.9 volts,thats a little high but not way out line.when it does run the timing chain i...
September 30, 2009