Conditions for Setting the DTC
WARNING: This page is about a different car, the 2017 Chevrolet Spark. However, it is still accessible from the selected car via links, so may be relevant.
B1516 08
The battery current signal is less than 4% or greater than 96% duty cycle for 2 minutes.
B1516 66
The battery current polarity is positive for 2 minutes.