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Home >> Chevrolet >> 2001 >> Venture Base, Van Passenger >> Repair and Diagnosis >> External Pages >> Different car >> Section 766 (Theft Deterrent System) >> Diagnostic Information and Procedures >> DTC P1631: Theft Deterrent Start Enable Signal Not Correct >> Diagnostic Aids

Diagnostic Aids

WARNING: This page is about a different car, the 2003 Pontiac Montana, 2003 Oldsmobile Silhouette, and 2003 Chevrolet Venture. However, it is still accessible from the selected car via links, so may be relevant.

DTC P1631 indicates that the PCM has detected an incorrect password from the theft deterrent control module. This condition can occur if an incorrect key is being used when attempting to start the vehicle or if the theft deterrent control module has been replaced and the PCMs password learn function has not been enabled.

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