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P1391 Diagnostic Trouble Code Discussion for October 2020

CKP Or CMP Sensor Signal Intermittent

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Trouble Ticket Help Requests for DTC P1391
Help Request Posted
2003 Dodge Ram 1500 Laramie 5.9L Stall, MIL Lamp on VIN: 1D7HU18Z33
P1391: Intermittent loss of cam or crank signal. ... one keeps tossing out P1391 no matter what we do. the only problem I've found that I havent' been able to correct is the actual sync pattern. I compared my pattern to a "known good" from this site and mine is off from it. The falling edge of th...
October 16, 2020