Conditions for Setting the DTC
WARNING: This page is about a different car, the 2002 Oldsmobile Aurora and 2001 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
If the code from the ignition key does not match one stored in memory, the theft deterrent control module sets this DTC. This code indicates the use of a key with a transponder that has not been learned by the theft deterrent control module. The vehicle considers this to be a theft attempt.