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P1391 Diagnostic Trouble Code Discussion for December 2009

CKP Or CMP Sensor Signal Intermittent

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Trouble Ticket Help Requests for DTC P1391
Help Request Posted
2002 Chrysler Town & Country EX 3.8L No Start, MIL Lamp on VIN: 2C8GP64L52
P1391: CKP Or CMP Sensor Signal Intermittent. ... should be easy but has been kickiní my butt. The vehicle came in for an intermittent cutting out on acceleration with a P1391 (intermittent loss of CMP or CKP sensor) I monitored engine data while driving and found the crank shaft sensor was dropping out. ...
December 24, 2009
2002 Dodge Ram 1500 SLT 3.7L MIL Lamp on VIN: 1D7HA16K62
P1391: Intermittent loss of CMPS or CRKPS. ... had already had truck at the dealer and there was no compression on cylinder #5. We also checked it and they were right. We pulled the heads, it had a valve seat come out and the exhaust valve was hung open. We checked and marked all the chains.The problem...
December 29, 2009