Dealer Ship Gave up

Hey, guess what, I just got a truck in my shop with po122 code. Ha! I was reading up on it and it seems as if this is a norm for dodge rams but with no fixes yet. I have multiple codes and no buss signals either. Oh, by the way, my otc scanner says I have a map sensor with low volts? This diesel dont have a map sensor? What do ya think of that. I think I will get a bigger hammer and rethink. I am going to unplug my alternator and clear codes. then drive with wires disconnected. This will eliminate voltage spikes that interupt sys buss. Any help on saving time will help, but I Guess I am on my own on this, the dealership gave up and brought it to me.:screwy: Oh other codes are,1644 no engine buss, 1687 no mic message, 1693 mil flt in comp module, 1698 no trany buss, 121 apps+idle validation dissagree, 1693 DTC detected, normal for mopar, HA! Has any one seen this? I will post the results.

Found all my problems. Had after market radio wired in wrong, two blown fuses, after market trailer lights shorted to dashlights, and boost sensor bad. my tps was also incorrectly adjusted by someone installing a used one. all good now. That one was a little tough.:smokin:

Found all my problems. Had after market radio wired in wrong, two blown fuses, after market trailer lights shorted to dashlights, and boost sensor bad. my tps was also incorrectly adjusted by someone installing a used one. all good now. That one was a little tough.:smokin:



Wow, sounds someone was in there with two left hands. Some of these are quite a puzzle...congratulations on finding them where the dealer couldent......