Well I posted sometime back that my 04.5 had thrown some codes and acted up a little. Well it has been running fine since so I have not payed that much attention to it. The only thing I have noticed is that at idle it will act like it surges or misses a beat. I have attributed this to the ac compressor but?

Now I get in it this morning and it will only rev to around 2500rpms, I noticed it while getting out on freeway in 3rd, nailed it (to the floor) and it revved and pulled good until 2500 and then just fell flat on its face. Now it held the rpm level but it was acting almost like it was missing. The truck runs fine and strong until 2500ish where it just wont go any further in revs. I can rev it beyond when it is not under load. What could this be? APPS, FCA sticking, ???. I am at a loss here, I have included all specifics that I can about the codes that were thrown about a month ago, and specifics about truck. Any help is appreciated.

Codes:

P0652-Low voltage at the #1 sensor supply circuit
P2121-Pedal position sensor 1
P0193-Fuel Rail Pressure high
P0341-Cam Position sensor 1

Truck is 04.5 with 600 Cummins, 6 spd, no mods other than K&N and exhaust

 

You need to address the low voltage to sensors 1st , then clear all other codes , with low voltage , you get all kinds of things reacting badly to low volts .
With that fixed the others may not be a problem .

 

Read this. I beat this is your problem.....

https://www.dieseltruckresource.com/...ad.php?t=81936

A wirerubbed raw in a loom around oil filter. Read Thread.

 

Spooler,

Thanks for the link, I am going to check this out this evening and see if this could be it. Sure sounds like it might be the problem.

 

BINGO!!!

I got under truck this evening and checked the wires and there it was. The wires had been rubbing on the compressor and had rubbed through the covering. Fixed it up, drove it and it is better than ever. Thanks for the help guys, this is why I look this thread over and ask for help when needed.

Spye

 

Glad it helped you out...... Easy fix.....