Conditions for Setting the DTC
WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. 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.