Actions Taken When the DTC Sets

WARNING: This page is about a different car, the 2010 Pontiac G5 and 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

The Service Vehicle Soon indicator is commanded ON.
When DTC C0278 is set as current, the vehicle will not start.
Stop lamps may not activate at the expected brake pedal positions.