I fixed this problem myself after I had this problem and Ford made me pay 1700 for a new cat converter, then released the recall. The light came back on after the update. The problem occurs again if you run premium gas. The check engine light will come back on. Run a tank of low test regular gas and the light will go back off. It's the system reading the octane levels wrong and ford is ripping people off. Would you believe god sent a messenger in a dream to tell me how to remedy the light coming in. I dreamed this solution and fixed it.