Conditions for Setting the DTC
WARNING: This page is about a different car, the 2018 Buick Envision. However, it is still accessible from the selected car via links, so may be relevant.
DTC B1025 01, B1045 01, B1065 01, B1075 01, B1085 01, B1095 01, B1105 01
A short to voltage is detected on the specified (+) or (-) signal circuit
DTC B1025 02, B1045 02, B1065 02, B1075 02, B1085 02, B1095 02, B1105 02
A short to ground is detected on the specified (+) or (-) signal circuit
DTC B1025 04, B1045 04, B1065 04, B1075 04, B1085 04, B1095 04, B1105 04
An open is detected on the specified (+) or (-) signal circuit