that comes up when your throttle body fails pulling a loaded 25 foot trailer, down 494 in Minneapoils during rush hour. Thats enough to piss a guy off. It will let your truck creep at 12MPH. O and mine is a gasser not a d max.
as rattlin ram pointed out, diesel do not have throttle bodies. i would take a guess at injector, or fuel problems. have to hook a scanner up to it.