Action Taken When the DTC Sets

WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

The ECM will not illuminate the malfunction indicator lamp (MIL).
The ECM will store the conditions present when the DTC set as Failure Records data only.
The ECM will send a class 2 serial data message to the instrument panel cluster (IPC) and driver information center (DIC) to illuminate the charge indicator or display a charging message.