Now that the mighty conglomerate Microsoft sorry I mean Ford have control.
I wouldn't be surprised to learn that the check engine light (CEL) behaves
>like most others.
>1. Fix the problem
>2. Disconnect the negative lead off the battery (noting any radio codes you >may need).
>3. (the clever bit) Discharge any system memory capacitors by leaving the
>doors open and pressing the foot brake pedal for 15 to 30 seconds.
>No guarantees but this method works for most CEL systems
>Good Luck
>Grant
>