I have a 2000 dodge 1/2 ton 5.9 magnum and it shut down on me gave me a no bus signal, I replaced the computer still the same thing, so I replaced the crankshaft sensor still nothing the the cam sensor then it started but still said no bus but runs fine. Check engine light is on only thing showing up is bank one sensor two for the O2 sensor. Any help is appreciated.

 

Did you replace the controller with a reman or one out of another vehicle?

 

I had/have similar issues. I'm no expert, but I have done some research on the subject. If you have a no bus indication, a lot of the time it means that the pcm bus has lost its 5 volt reference signal. It would way too easy if that were the only cause, but it is a likely one. I would start by inspecting all of the harnesses. Should be 3 connected to the pcm. If they're all good, a little dielectric grease on the connections shouldn't hurt anything. There's a couple of harnesses on the firewall in the cab, below and to the left of the steering wheel, one had a 10mm head bolt on it. If they look all good, a little more dielectric grease might be a good idea. Another connector in the fuse box. If there's no obvious problems with wiring, you might check the crankshaft position sensor and camshaft position sensor. Good luck