Ford released an official TSB about reprogramming the PCM and Battery modules for the concern of lack of electric vehicle operation at aprox. 10 years of age.  Print out the TSB and show your dealer for reprogramming. Looks like it may be covered under extended emissions warranty??   For the people who used Forscan as a work around, this TSB may or may not work as PCM data has been altered and a mismatch results between the PCM and Battery module. If you get the official Ford fix