Action Taken When the DTC Sets: P0856

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

The PCM sends a serial data message to the EBCM stating that the PCM has lost the ability to reduce engine torque.
The EBCM sets DTC C0298 as a current DTC for as long as the malfunction is present.