Conditions for Setting the DTC
WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
The BCM is unable to measure the ignition key transponder value. This may be due to a damaged or missing transponder, a non PASS-Key III (PK3) key or a damaged theft deterrent exciter module.