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P1291 Diagnostic Trouble Code Discussion for March 2009

CNG Pressure Sensor Circuit Low Voltage

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Trouble Ticket Help Requests for DTC P1291
Help Request Posted
1999 Dodge Ram 2500 5.9L MIL Lamp on VIN: 1B7KF2361X
P1291: intake heating circuit malfunction. ... Truck came in Friday, MIL light on and DTC P1291, Intake heater malfunction. Using MODIS Trouble shooter, suggested running both heater circuits, one at a time and observing a .5 volt drop on battery. Doing first circuit, could hear clear and loud a solino...
March 09, 2009