Conditions for Running the DTCs

WARNING: This page is about a different car, the 2016 GMC Acadia, 2016 Chevrolet Traverse, and 2016 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.

Ignition ON.
Gear selector in DRIVE.
Headlamp switch in AUTO position.
The ambient light sensor indicating Night.
Vehicle speed greater than 2 km/h (1.3 mph).
The steering wheel is turned greater than 10 degrees to the right or left.