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P1309 Diagnostic Trouble Code Discussion for August 2009

Misfire Detection Monitor

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Trouble Ticket Help Requests for DTC P1309
Help Request Posted
1998 Ford Ranger Splash 4.0L MIL Lamp on VIN: 1FTYR14X9W
P1309: Misfire Detection Monitor Malfunction. This 5/98 Ranger 4.0 had P0340 and a P1309 codes we inspected the computer harness and found the four pins in the lower drivers side of the EEC-V harness were corroded with " green Crud." We replaced the ECU and cleaned the connector and then we replac...
August 05, 2009