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P1668 Diagnostic Trouble Code Discussion for June 2010

Generator L-Terminal Control Circuit Malfunction

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Trouble Ticket Help Requests for DTC P1668
Help Request Posted
1999 Ford F-350 Super Duty XL 7.3L No Start
P1668: PCM To IDM Diagnostic Communication Error. ... help..this truck will not start. ran fine then next day would not start..scann shows p1668 com error. i checked the archives and all previous say the idm would be the cause..i swapped it out with another and still no start but i now get a kam error. i noti...
June 13, 2010