Actions Taken When the DTC Sets

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

The headlamp control module disables the headlamp leveling system.
The driver information center (DIC) will display AFL Lamps Need Service.
On vehicles equipped with both AFL and headlamp leveling, the AFL system will remain active.