Actions Taken When the DTC Sets
WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
DTC B258A 01 or B258A 04
- The low beam headlamps will not operate.
- The driver information center will display "Left Low Beam Failure" and "Right Low Beam Failure".
DTC B258A 02
The low beam headlamps will always be ON.