Diagnostic Aids
WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
The DTC C0161 00 can be set if the vehicle has been driven with the brake applied during acceleration. Verify that the brake pedal position sensor is properly calibrated. Refer to DTC U1826 or U1827 .