× 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 2010

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
2003 Dodge Durango SLT 5.9L Cuts out, Stall, MIL Lamp on VIN: 1D4HS48213
P1391: CKP Or CMP Sensor Signal Intermittent. ... complaint of engine bogging down. Customer drilled a bunch of holes through Catalytic converter because it acts like a plugged cat. Check engine is on for loss of Cam/Crank sync(p1391). Verified exhaust was not plugged by removing o2 sensor. Problem still ...
August 02, 2010
1996 Chrysler Sebring JXi 2.5L Poor Idle Quality, MIL Lamp on VIN: 3C3EL55H3T
P1391: Intermitant loss of cmp signal. ... sebring that has an engine light on. The code is p1391 - intermitant loss of cmp signal. I checked the ckp sensor and the cmp sensor at each connector, and at the ecm. Supply voltages are constant and signals never cut or drop out. No problems with either ...
August 30, 2010