Conditions for Setting the DTC
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.
B1722 01
The door lock/window switch has detected a short to voltage in the mirror folding control circuit while commanding the outside rearview mirror.
B1722 02
The door lock/window switch has detected a short to ground in the mirror folding control circuit while commanding the outside rearview mirror.
B1722 04
The door lock/window switch has detected an open/high resistance in the folding mirror control circuit while commanding the outside rearview mirror.