I unhooked all sensors, tps, crank ps, cam ps, map s. Still get "no bus" code.

Checked all the grounds. Swapped battery with a known good one. Took off the gauges and put back on.

Believe me when I say I searched.

But I think I'm still missing something.

Any help is much appreciated.

 

Welcome to Dodgeforum.com, generally tech threads go in the tech section

I had this exact issue and solved it by cleaning the ground to the PCM and PDC and tightening a bolt down in the PDC (cant for the life of me remember which one...). Hopefully someones memory is better then mine and will chime in with the right one.

 

First off, welcome to DodgeForum.com

Second off, please post info about your truck, year, engine, trans, etc, or better yet put it in your signature.

Third off, NEVER assume it is a bad PCM just because you have "tried" everything, more often than not you will find you missed something and the PCM is just fine.

Fourth, simplest fix first.

https://dodgeforum.com/forum/2nd-gen...s-working.html

If that doesn't work, sometimes a wire under the dash gets frayed. Lemme find that link...

 

The screw in that link is the one iI'm reffering to! I've seen multiple of these trucks with no bus and that solve it.

 

I saw that and removed it but it looked clean to me so I put it back. I'll still spray though.

What is the pdc. I cleaned all grounds, chassis, body, engine.

 

Oh and thanks for the quick replys.

 

pdc is power distribution center, the black plastic box with all the relays and fuses, next to the battery.

i've had the no bus a couple of times, and both times it cleared by unplugging/replugging the big plug in the pdc. the center screw only goes in so far and then acts like its stripped. that's normal to prevent overtightening. disconnect battery before removing this plug. mine was not dirty, but likely tarnished or something. try unplug/replug a couple of times to scratch the pins clean.

 

Does the comp have to be from a truck exactly like mine.

01 ram 4x4 5.9 auto

I don"t know why my sig isn't showing. Or is it?

 

Your sig is showing, PCM can be from a 99, 00, or 01, and must have the 5.9L auto PCM, but just to make things easy it's best to try for one matching yours first.

 

Then you have to get the VIN flashed at the dealer.

And hope they don't put the deathflash on it....