Diagnostic Aids
WARNING: This page is about a different car, the 1999 Pontiac Grand Am and 1999 Oldsmobile Alero. However, it is still accessible from the selected car via links, so may be relevant.
Check for poor connections at BCM and Passlock(R) sensor. If DTC is history, problem may be intermittent. Perform test procedure while wiggling wiring and connectors.