Conditions for Setting the DTC
WARNING: This page is about a different car, the 2015 Chevrolet Trax and 2015 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.
B2750 01
The Body Control Module detects a short to voltage in the horn relay control circuit.
B2750 02
The Body Control Module detects a short to ground in the horn relay control circuit.
B2750 04
The Body Control Module detects an open/high resistance in the horn relay control circuit.