The official notice
Defect
This recall is for supercharger upgrade kits that were installed before delivery or purchased from a dealer as an aftermarket accessory. Under certain conditions, the upgrade kit's powertrain control module (PCM) software may not work properly and could turn off certain safety features. If this happens, the vehicle could move and/or accelerate unexpectedly. Note: This recall only affects vehicles equipped with a 5.0 L engine. This problem could cause a malfunction indicator light or a wrench light to turn on in the instrument cluster.
Safety Risk
A vehicle that moves and/or accelerates suddenly could create the risk of a crash.
Remedy
Ford will notify owners by mail and advise you to take your vehicle to a dealership to update the PCM software.