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P1391 Diagnostic Trouble Code Discussion for April 2008

CKP Or CMP Sensor Signal Intermittent

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Trouble Ticket Help Requests for DTC P1391
Help Request Posted
1998 Jeep Grand Cherokee Laredo 4.0L No Start VIN: 1J4GZ58S9W
P1391: CKP Or CMP Sensor Signal Intermittent. Originally blown ASD relay fuse - Installed new fuse, started right up - Drove vehicle and ran ok, backed into parking place and stalled, blown fuse again. Investigated and found downstream Oxygen sensor wires shorted by rubbing on driveshaft yoke. With this I...
April 19, 2008