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P1391 Diagnostic Trouble Code Discussion for January 2010

CKP Or CMP Sensor Signal Intermittent

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Trouble Ticket Help Requests for DTC P1391
Help Request Posted
2000 Dodge Intrepid 2.7L MIL Lamp on VIN: 2B3HD46R6Y
P1391: CKP Or CMP Sensor Signal Intermittent. intermittent ses code p1391 loss cmp/ckp. replaced both sensors and timing chain and guides. using scope intermittently ckp signal losses pulse or pulse not as high as others. also intermittently will have spike go down( neg voltage -2.5ish volts)when back pro...
January 27, 2010