Conditions for Setting the DTC

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

C0161.00

The EBCM detects the vehicle speed is greater than 11 km/h (7 mph), the brake pedal is applied for one minute, and the brake pressure detects pressure less than the set value.
The EBCM detects the vehicle speed decreases, the brake pedal is released and the brake pressure sensor detects an increase in pressure.

C0161.71

The EBCM detects an invalid brake pedal signal from the BCM.