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P1631 Diagnostic Trouble Code Discussion for May 2010

Theft Deterrent - Start Enable Signal Not Correct

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Trouble Ticket Help Requests for DTC P1631
Help Request Posted
1999 Cadillac Eldorado ESC 4.6L No Start VIN: 1G6EL12Y2X
P1631: Theft Deterrent System - Start Enable Signal Not Current. ... shop they installed a water pump and being the shop owners car he decided to do a little P.M. and change the Alt also. The alternator was defective with a dead short (straight from GM themselves) and upon install shorted out. Soon after the theft deterent ...
May 06, 2010
2001 Chevrolet Silverado 2500 HD 8.1L No Start VIN: 1GCHK29G41
P1631: Theft Deterrent - Start Enable Signal Not Correct. ... a proublem for over 3 years. Just doing the relearn worked for a long time at first. Intermetint no starts, securety light flashes while driving. I have read all the closed repairs and I changed the key& tumbler and the housing, with aftermarket parts....
May 14, 2010