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P1391 Diagnostic Trouble Code Discussion for March 2009

CKP Or CMP Sensor Signal Intermittent

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Trouble Ticket Help Requests for DTC P1391
Help Request Posted
1996 Plymouth Grand Voyager SE 3.3L Poor Idle Quality, Stall, MIL Lamp on VIN: 1P4GP44R0T
P1391: CKP Or CMP Sensor Signal Intermittent. Here goes nothing, Voyager 3.3 v6 comes into us 3 days ago with intermittent stalling problem, customer stated that he was driving, came up to stop sign and van stalled, tried for about 10 minutes to start it back up but vehicle just cranked but did not fire. ...
March 06, 2009
1999 Dodge Grand Caravan LE 3.3L No Start VIN: 2B4GP44ROX
P1391: CKP Or CMP Sensor Signal Intermittent. this vehicle was tested with a lab scope. the 5 volt high and low .035 volt is present on both the cam & cranksensor. but the spark & injector pulse is intermittent. also the flexplate has been checked for spinning but it checks out ok. trying to deter...
March 11, 2009
2001 Dodge Ram 2500 8.0L Cuts out, Misfire VIN: 1B7KF23W21
P1391: cmp/ckp. ... all speeds,idles fine.plugs& wires are new and not damaged.no missfire codes,fuel pressure holds at 50 psi,also noticed occasianal loss of comms with ecm.only code found was p1391 cmp/ckp sensors tested good!
March 25, 2009