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P1668 Diagnostic Trouble Code Discussion for January 2009

Generator L-Terminal Control Circuit Malfunction

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Trouble Ticket Help Requests for DTC P1668
Help Request Posted
2001 Ford F-350 Super Duty Lariat 7.3L Surge, MIL Lamp on VIN: 1FTWW33F81
P1668: PCM To IDM Diagnostic Communication Error. This truck has an intermittant problem which causes the check engine light to come on and engine runs very poorly. It does not seem to be related to temperature. Feels like its running on 3 or 4 cyls. While problem occurs can check pcm codes and p1316(idm code...
January 13, 2009