I get this code when I turn my box on and get after it then I come to a stop right away. The truck dies and I can't start it by cranking on it but if I pull start it then it will start. I'm going to get a fuel pressure gauge but I don't think that really has any thing to do with this code. P1594 = Charging system voltage too high. I hope someone has some ideas.
thanks
Paul
thanks
Paul