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P1391 Diagnostic Trouble Code Discussion for December 2005

CKP Or CMP Sensor Signal Intermittent

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Trouble Ticket Help Requests for DTC P1391
Help Request Posted
2000 Jeep Grand Cherokee Laredo 4.0L No Start, MIL Lamp on VIN: 1J4GW48S4Y
P1391: CKP Or CMP Sensor Signal Intermittent. ... came into our shop & the customer complaint was no tach or speedo plus a check engine light. We started our diagnostics & pulled a code P0340 CMP Sensor Circuit. After starting the vehicle twice during diagnostics it would no longer start. Called t...
December 08, 2005