Have developed a challenging problem. When driving at highway speeds on clear roads in good weather for about 10 miles the VSC indicator light comes on and stays on until I turn the car off. When restarted the light is off until I drive again on a freeway. There is no heavy braking or hard cornering, just in the lane 65+ MPH. Had it checked with the Snap On diagnostic tool and there were no codes (hard of soft). Thoughts?