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P1274 Diagnostic Trouble Code Discussion for August 2005

Air Fuel Sensor (Bank 1 Sensor 1) Rich Shift Monitoring

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Trouble Ticket Help Requests for DTC P1274
Help Request Posted
2001 Ford F-450 Super Duty Lariat 7.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FDXF46F41
P1274: Cylinder 4 - High To Low Side Open Detected. I have gone and checked these codes in my books and ran the flowcharts and everything looks good. The last thing I tried was replacing the IDM. The resistance on the #4 inj. was 2.9 ohms. The resistance ont the harness on both the high and low from the inj to ...
August 16, 2005