So everytime I shut my truck down, I get ABS on the screen and a red triangle with a 1 in it once the truck is off. Once I restart, there is no fault or sign of an ABS problem. I can't read any code because the truck is off. I dont even know where or how to start to figure this out. Truthfully, I am not even sure I have a problem as I only get this when the truck is turned off. Any insight or help on this one?