What does code P0411 mean on a 2007 Chevy Cobalt?

Code P0411 on a 2007 Chevy Cobalt indicates that there is an issue with the Secondary Air Injection System, specifically that the system is not functioning as expected. This code typically arises when the engine control module (ECM) detects insufficient air flow during the air injection system's operation. Common causes can include a malfunctioning air pump, a blocked air passage, or issues with the related sensors or valves. Addressing this code may involve inspecting and repairing or replacing components of the secondary air injection system.