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P1391 Diagnostic Trouble Code Discussion for November 2009

CKP Or CMP Sensor Signal Intermittent

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Trouble Ticket Help Requests for DTC P1391
Help Request Posted
1997 Ford E-350 Econoline 7.3L Poor Idle Quality, Surge, Cuts out, MIL Lamp on VIN: 1FDKE30F4V
P1391: Glow Plug Circuit Low Input On Bank 1 (Right Side). this truck was towed in as a no start to find battery shorted out new battery installed and now we have the codes listed. Ford said to replace the pcm so we hade the pcm repaired by Go ecm in texas no help
November 24, 2009
1998 Chrysler Concorde LXi 3.2L No Start, MIL Lamp on, VIN: 2C3HD46J3W
P1391: CKP Or CMP Sensor Signal Intermittent. We have since replaced both the cam and crank sensors.Checked timing marks and replaced leaking water pump and timing belt. Still no start unless disconnect cam sensor.Manual grounds are ok. Ref voltage is 8.99 volts. spec is 5 to 8v.changes to 9.12 when unplu...
November 25, 2009