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P1631 Diagnostic Trouble Code Discussion for October 2012

Theft Deterrent - Start Enable Signal Not Correct


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Trouble Ticket Help Requests for DTC P1631
Help Request Posted
1998 Chevrolet K1500 Cheyenne 5.7L Poor Idle Quality, Surge VIN: 1GCEK19R4W
P1631: Theft Deterrent System - Learn Mode Enable. New customer, unknown history, truck runs great above 700 rpm but idle will fluctuate 400 rpm have check fuel pressure, map, have installed know good maf, tp, and iac, checked trans range switch and showed in park, O2 sensors are both moveing good, Cmp retard ...
October 15, 2012
1998 Chevrolet K1500 Cheyenne 5.7L Poor Idle Quality, Surge VIN: 1GCEK19R4W
P1631: Theft Deterrent - Start Enable Signal Not Correct. New customer, unknown history, truck runs great above 700 rpm but idle will fluctuate 400 rpm have check fuel pressure, map, have installed know good maf, tp, and iac, checked trans range switch and showed in park, O2 sensors are both moveing good, Cmp retard ...
October 17, 2012
1998 Chevrolet K1500 Cheyenne 5.7L Poor Idle Quality, Surge VIN: 1GCEK19R4W
P1631: Theft Deterrent - Start Enable Signal Not Correct. New customer, unknown history, truck runs great above 700 rpm but idle will fluctuate 400 rpm have check fuel pressure, map, have installed know good maf, tp, and iac, checked trans range switch and showed in park, O2 sensors are both moveing good, Cmp retard ...
October 15, 2012
1998 Chevrolet K1500 Cheyenne 5.7L Poor Idle Quality, Surge VIN: 1GCEK19R4W
P1631: Theft Deterrent - Start Enable Signal Not Correct. New customer, unknown history, truck runs great above 700 rpm but idle will fluctuate 400 rpm have check fuel pressure, map, have installed know good maf, tp, and iac, checked trans range switch and showed in park, O2 sensors are both moveing good, Cmp retard ...
October 17, 2012