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P1631 Diagnostic Trouble Code Discussion for February 2008

Theft Deterrent - Start Enable Signal Not Correct

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Trouble Ticket Help Requests for DTC P1631
Help Request Posted
2002 Chevrolet Impala 3.4L No Start VIN: 2G1WF55E52
P1631: Theft Deterrent Fuel Enable Signal Not Correct. Vehicle came in with the BCM going haywire and codes in all the other modules for the BCM. After confirming good powers, grounds and no shorts, I replaced the BCM. The problem I am having is the Passlock reset procedure is not working. I have done the whole &...
February 13, 2008