Conditions for Setting the DTC
WARNING: This page is about a different car, the 2011 GMC Yukon, 2011 Chevrolet Tahoe, and 2011 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
B1516 08
The BCM detects the PWM duty cycle on the sensor signal circuit is less than 4 percent or greater than 96 percent for 2 minutes.
B1516 66
The BCM detects positive battery current when the engine is OFF.