Stranded - need knock sensor

[JimT]

Even with a bad NOx sensor you should still be able to move the truck, although if it's been ignored long enough it might be derated all the way down to 5mph or something. You should have had plenty of less severe warnings long before you get to that point. Regardless you may want to check the electrical connections, clean up any corrosion, make sure no loose or broken wires and check all your vehicle grounds.