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.
The EBCM detects the voltage on the 5 volt reference circuit to the brake master cylinder piston position sensor, steering angle sensor and brake master cylinder piston position sensor is less than 4.8 volts or greater than 5.2 volts.