I received my recall to have the catalytic converters and 02 sensors replaced with a PCM flash. I have done a bit of digging into what the flash does. Apparently the original flash was causing the throttle body to close to soon when the car was shut down causing back pressure through the super charger. I understand this has been corrected now. You’d think they would have had that figured out before they released the recall.... Of course when I contacted the dealer to have this done they informed me that the parts are on back order.