Toyota Repair: Add VSC Trac off, NO CSL ABS, toyota sienna 2003, scantool

Question
Have an odd VSC TRAC OFF light question. Every once in a while after driving highway speeds for 30 or so miles, my VSC and TRAC OFF lights come on. NO CEL light or ABS light.
Restarting resets them to off and they may not come back on for hundreds of miles. Toyota Sienna 2003 xle. 72k. Every heard of this?

Answer
Not really but I would recommend having the toyota dealer connect their diagnostic scantool to see what trouble codes may have stored in the system either present or in the history, these lights do not come on unless there is a problem with the system, it may be intermittent but nevertheless the cause should be diagnosed.