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P1391 Diagnostic Trouble Code Discussion for November 2018

CKP Or CMP Sensor Signal Intermittent


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Trouble Ticket Help Requests for DTC P1391
Help Request Posted
2000 Jeep Cherokee Sport 4.0L Excessive Emissions, Hesitation, Surge, Cuts out, Stall, Misfire VIN: 1J4FF48S6Y
P1391: CKP Or CMP Sensor Signal Intermittent. ... that is kicking my butt. It came in with a running rough concern, has been to 3 other shops with no resolve. Setting code P1391. Starts good most the time and will idle fine, once it reaches about 1800 rpm it will start to misfire and run really rough...
November 13, 2018