En route from Denver to Wichita, the "check engine...

En route from Denver to Wichita, the "check engine" light went on in the evening. I took it to Eddy's Toyota and explained that I had no problem after having my Highlander serviced in Denver. Eddy's promptly looked at my car and determined that the timing was set for "mile high" and reset it for "east of the Rockies." The car took me to the East Coast and has needed no more work. The "check engine" light has remained off. I am highly satisfied.