Pcm Code P068 - Cruise Control Servo Position Out Of Range: Notes
WARNING: This page is about a different car, the 1993 Cadillac Seville and 1993 Cadillac Eldorado. However, it is still accessible from the selected car via links, so may be relevant.
PCM Code P068 is set and cruise control is disabled when cruise control servo feedback reading is significantly higher or lower than commanded value for a period of time.