Conditions for Setting the DTC
WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
B1405 02
The Parking Assist Control Module has detected the 12 V reference circuit is shorted to ground.
B1405 03
The Parking Assist Control Module has detected the 12 V reference circuit is less than 7.2 V.
B1405 07
The Parking Assist Control Module has detected the 12 V reference circuit is shorted to voltage.