Hi All,

New to the forum, but I did a search on "apps" in this forum and nothing came up... maybe I'm the first out of the 4th generation to have this issue?

Anyway, here's the situation:
Bought used on 1/22/15

2010 Dodge RAM 2500 Laramie 6.7L Cummins. 139,240 miles. All service done by Dodge, on time up to this point. Truck is stock... for now.

A week ago, the CEL came on. Took it to Black Widow Diesel in Center Point Iowa (awesome place) for a code read and it showed APPS #2 running at about 1/2 the voltage of the APPS #1. We cleared the code and it ran fine... up until I had a thought yesterday that when the 1st time the code came on, I had it in cruise control. I put it is cruise and yup, the CEL came on.

In doing searches, I have seen where a lot of people are having a problem with APPS's, but only one is mentioned as being available or replaced.

Here are my questions:

Is the APPS #2 for the cruise control?
Is the part available or do I have to go through Dodge?
Is it replaceable by me? (I've rebuilt a number of cars and trucks and have just about every tool...)
Where IS it?

In the short term, I do plan on checking ground point to make sure none are corroded or loose - Any ideas of ones to check?

I have seen "reset" instructions on other forums, but I'm not sure that would work if I'm truly getting 1/2 of the voltage of the other one.... leads me to the grounding issue.

Any thoughts?

I am getting a BAFX Products - Bluetooth OBD2 scan tool ( ) since it seems as if one should really have a scanner handy with these trucks, but it won't be here until next week.

I do plan on getting a tunner and delete pipe within the next year. Then after that a gen 2 (or is it 3) manifold (3 +3 into 1), flipped over so the turbo is on top and then a custom down pipe. (Anyone know if the stock muffler has good enough flow or should I look at a aftermarket muffler?)

I'll work on a sig soon.

Thanks for any insight you may provide.

Dan

 

Well, I took the truck into the dealer and they pulled codes, says it was two of the O2 sensors. They replaced them and no problems since.

Dan

 

Glad you got it fixed.