Conditions for Setting the DTC
WARNING: This page is about a different car, the 2011 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
C0277 06
The BCM detects a short to ground or open on the brake apply sensor signal circuit, or a short to ground or an open in the brake position sensor 5-volt reference circuit.
C0277 07
The BCM detects short to voltage on the brake apply sensor signal circuit.
C0277 09
The BCM detects the brake pedal position sensor reading is erroneous.
C0277 4B
The BCM detect that the brake pedal position sensor home position is not learned.
C0890 03
The BCM detects a short to ground in the brake position sensor 5-volt reference circuit.
C0890 07
The BCM detects a short to voltage in the brake position sensor 5-volt reference circuit.