Ford P0411 OBD-II Trouble Code Definition: P0411 Secondary Air Injection System Insufficient Flow P0411 Ford OBD-II Trouble CodeDescription: OBD Trouble Code P0411 Secondary Air Injection System Incorrect Flow Detected What does the code mean? OBD-ii Code P0411 definition: The optical sensor provides a high resolution signal to the Powertrain Control Module (PCM) by counting pulses on […]