Diagnostic Aids

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.

A high or low voltage DTC set or voltage value in multiple modules/sensors indicates a concern in the charging system.
A possible cause of this DTC could be overcharging with a battery charger or jump starting.