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P1670 Diagnostic Trouble Code Discussion for October 2008

Output Driver 4 Voltage High Input

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Trouble Ticket Help Requests for DTC P1670
Help Request Posted
2000 Ford F-250 Super Duty XL 7.3L No Start, hard start cold VIN: 1FTNXZ1F8Y
P1670: EF Feedback Signal Not Detected. Vehicle has been fine since last November. Now in the last few weeks customer has to cycle glow plugs 3 times to get engine to start and then it will fire and puff white smoke. Checked glow plugs and relay-fine. Removed valve covers and checked oil flow from i...
October 27, 2008