Conditions for Setting the DTC

WARNING: This page is about a different car, the 2002 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.

A new BCM has been installed and the ignition is turned to the ON position but not rotated to the CRANK position. Once the ignition switch has been rotated to the CRANK position, the BCM will learn the Passlock™ code. The theft relearn procedure will need to be performed in order to make the powertrain control module (PCM) receive the correct fuel enable password.
The BCM is in the learn mode but does not see a valid Passlock™ sensor code because of a sensor or a wiring problem.