Conditions for Setting the DTC
WARNING: This page is about a different car, the 2017 Chevrolet Spark. However, it is still accessible from the selected car via links, so may be relevant.
DTC B260B 02 or B260C 02
The BCM detects a short to ground on the control circuit.
DTC B260B 04 or B260C 04
The BCM detects an open control circuit.