P0122 Low Votage to APPS

[Jeff Eady]

Hello,

I have a 2001 Dodge Ram 3500 5.9 4x4 5spd. I started having a dead pedal and surging issue a few days ago. OBD reader shows low voltage to TPS. I used mikes diagram and made it to step 9 and I had continuity with the PCM and ECM orange and dark blue wire. It’s saying repair short to ground in the orange and blue wire. I checked all of the grounds to the ECM and PCM but I’m not sure where to check for the orange and blue grounding. I would appreciate any help that you guys can offer. I’m not a very good mechanic and no one in my area can even get

my truck in the shop until September 15…

Edited August 5, 2021 by Jeff Eady

[Dieselfuture]

Personally I would recommend getting a timbo apps, doing a WT mod and checking alternator for AC noise. More than likely it will resolve your issues and prevent others. 

[dripley]

I went thru pretty much the same thing a few years back. I replaced my battery cables and did  WT's ground mod. Already had a Timbo apps. All that cleared mine up. This trucks are very picky about their DC power supply. And they dont play nice with alot of AC noise.

[Jeff Eady]

Thanks guys for the response. Can you advise where I can find information on how to do these repairs? I’m not sure what the WT or how to check the alternator for AC noise. Thanks

[Threadzy]

 

[Mopar1973Man]

WT ground wire mod is quick about an hour job to split the loom open and mkae the new connections. You just need the crimps for the wire and then a 150A circuit breaker or fuse for the alternator charge lead.  I've done three trucks now, my 2002 Beast has this mod too.

Edited August 6, 2021 by Mopar1973Man

[Jeff Eady]

Thanks for all of the help guys! Truck stopped having the issue for 2 days and started again this morning but not as bad. Such a weird truck….