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P1631 Diagnostic Trouble Code Discussion for December 2009

Theft Deterrent - Start Enable Signal Not Correct

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Trouble Ticket Help Requests for DTC P1631
Help Request Posted
2000 Mazda Protege ES 1.8L MIL Lamp on, harsh shift VIN: JM1BJ2235Y
P1631: Generator Output Signal (No Output). ... in limp home mode, third gear only. found codes p0745 and p1631. codes cleared and test driven, codes come back almost at the same time and a harsh shift occurs then the transmission goes into limp home mode. we left a volt meter on the battery with the ca...
December 09, 2009
1998 Cadillac DeVille 4.6L No Start VIN: 1G6KD54Y8W
P1631: Theft Deterrent System - Start Enable Signal Not Current. ... that origanally was towed in no-start. Was a repo so no history available. It had a no crank condition with some ipc u-codes. I replaced the ipc "used" and was able to crank engine but no start due to a p1631 password incorrect code. I reprogrammed...
December 28, 2009