Ford P0417 OBD-II Trouble Code Definition: P0417 Secondary Air Injection System Switching Valve B Circuit Shorted P0417 Ford OBD-II Trouble CodeDescription: OBD Trouble Code P0418 Secondary Air Injection System Control “A” Circuit What does the code mean? OBD-ii Code P0418 definition: The optical sensor provides a high resolution signal to the Powertrain Control Module (PCM) by […]