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P1631 Diagnostic Trouble Code Discussion for September 2008

Theft Deterrent - Start Enable Signal Not Correct

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Trouble Ticket Help Requests for DTC P1631
Help Request Posted
1999 Chevrolet Astro 4.3L No Start, Cuts out VIN: 1GNDM19W8X
P1631: Theft Deterrent - Start Enable Signal Not Correct. ... stall, engine always started to us with no problem, one day left over night and it did the problem, started and stalled a fue times and then it will not start any more. security light stays on when not startin. checked for codes and found 1. P1626 loss of ...
September 03, 2008