[karma1]

Most ODB-II scanners allow a reset of the check engine light, which resets the codes held, which should allow you to re-engage Sport mode. This might void your warranty, but it might be worth carrying one in the glove box until we get 6.14, so you aren't stranded. $70 for piece of mind. I think I will be buying one.
http://blujay.com/item/OBDII-ENGINE-SCANNER-AND-CHECK-ENGINE-LIGHT-RESET-TOOL-8120000-3273307

FWIW- my Mercedes dealer was unable to reset the codes on the Fisker using either of two different scanners. Not sure why, but there may be something else that you need to know to reset.