18,750 miles, just coming out of the mountains (approx. 7,000 feet) for a
week.
Back to the plains, (approx 3500 feet)braked a bit hard for a stop sign I
snuck up on a bit fast.
The light came on, checked gas cap, (half tank left)  eveything performance
wise seems fine, finished up the last 350 miles without a hitch.
Acceleration, idle, cruise, everything performed flawlessly.
You've helped me a great deal with a dealer that doesn't seem to know up
from down, so value your opine.  Did see something (last spring when you
sent the squeaky pulley fix)on a vent tube campaign for high altitude, but
when I called him today, said mine didn't qualify as it is driven at about
2000 feet routinely and a short trip shouldn't cause the trouble.
The strange thing was it lit when I braked.
Ideas????
Thanks
Mark