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P1391 Diagnostic Trouble Code Discussion for July 2004

CKP Or CMP Sensor Signal Intermittent

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Trouble Ticket Help Requests for DTC P1391
Help Request Posted
1998 Jeep Wrangler SE 2.5L Poor Idle Quality, Cuts out, Misfire VIN: 1J4FY29P2W
P1391: CKP Or CMP Sensor Signal Intermittent. Well here it is... We replaced the engine on this 2.5 with a reman last week. There were piston skirts in the oil pan. We knew we had a problem. After install the vehicle ran fine for a few days. Customer came in for a no start. He was able to start it and lim...
July 22, 2004
1997 Chrysler Town & Country LX 3.8L Stall, Misfire, MIL Lamp on VIN: 1C4GP54L1V
P1391: CKP Or CMP Sensor Signal Intermittent. OK... Thought this one would be easy, hell 3.8s are pattern fail children arent they? Towed in, no RPM signal. Crank sensor open, zero signal. Install new crank sensor, fires up and runs great. Customer pickes up, drives away, gets towed back in an hour later....
July 30, 2004