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P1668 Diagnostic Trouble Code Discussion for April 2015

Generator L-Terminal Control Circuit Malfunction


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Trouble Ticket Help Requests for DTC P1668
Help Request Posted
2001 Ford F-250 Super Duty Lariat 7.3L No Start VIN: 3FTNX21F31
P1668: PCM To IDM Diagnostic Communication Error. ... start. scan found p1668. did injector buzz test: scan tool could not perform test and returned a "no comm" error. checked v/covers and ICP for the common shorts. (even the IPR wire insulation was ok!) tested the circuits between PCM and IDM, checke...
April 06, 2015