I have an 01 Dodge Ram 1500. I was driving it to work one day when it completely shut down all of a sudden while driving. A "no bus" code on the dash popped up, and when I tried to start it again, it would crank but not start and I had to get it towed back to my house. I've been messing with it for a few weeks now and noticed it starts occasionally and if I do get it to start it shuts itself off again and still reads "no bus". I used my OBD2 scanner and get no communication to the ABS everytime whether I get it to start or not. I just replaced my ABS module with a used one I got online and I still have the same outcome as I did before. I replaced my battery as well (not that it would fix it, but it needed a new battery anyway).

I've read that a "no bus" code could be from a bad ABS module, bad PCM, or a bunch of other things lol. Any help would be greatly appreciated on this stressful problem. 👍

P.S. I doubt this has anything to do with it, but I changed my car stereo with a new one a week before my truck started giving me problems. I don't think that would cause anything but maybe you guys know something I don't lol. TIA

 

Are you getting power to the PCM? Getting spark? Fuel pump prime?

 

Well actually the radio is connected to CCD bus which is what ABS, PCM, instrument panel etc. use. Look for a violet/brown and a white/black wire and make sure they are not shorting or touching ground.