× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network

P1391 Diagnostic Trouble Code Discussion for August 2004

CKP Or CMP Sensor Signal Intermittent

Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC P1391
Help Request Posted
2000 Dodge Caravan 2.4L No Start VIN: 2B4FP25B14
P1391: CKP Or CMP Sensor Signal Intermittent. ... a no start condition and a code p1391 stored in memory. In the scanner data mode the cmp/ckp sensor would come out of sync and the 2 sensors would alternate with a lost signal. Individual checks on the sensors checking for the 8 volt reference and ground t...
August 02, 2004
1997 Jeep Cherokee SE 4.0L MIL Lamp on VIN: 1J4FT28S9V
P1391: CKP Or CMP Sensor Signal Intermittent. ... from our other tech who replaced the crank sensor and wires. (plugs: champion platinum were replaced by customer). The other tech says there was a misfire code in addition to the P1391 and P0340. After replacing wires no misfire code. This is one of my bes...
August 12, 2004