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The software upgrade resets the Super Duty powertrain control module on the Ford trucks to recognize improper levels of heat in the exhaust system. If heat is detected the system will power down the truck so the driver can pull to the side of the road and allow the truck to cool off.
oh yeah, that sounds like a GREAT idea, just pull off to the side of the road whenever the truck gets too hot instead of actually investing some real money and fixing the problem.... oh wait, it's Ford... nm, thought you might actually want a real product that works right...