We have travelled 14,000 miles in the last 4 months pulling 13,000 lbs of 5th wheel. I've been very pleased with the performance and mileage (almost 12), but I've just had to replace the above part (#53031576AD) twice in the last 18 months. The first time it had about 80000 miles on it and was under warranty, but this time it cost me $600 since I now have 118,000 miles on the truck. Has anyone else had trouble with this on the 01 HO manual? Does anyone have any suggestions as to what might be causing the problem?
The symptoms are: going down road and tranny is in gear but all of a sudden the engine goes down to idle RPMs, the engine malfunction light comes on, and the truck looses all sense of being in gear; it's like it's in neutral and no matter how much you push on the accelerator the truck still idles. Sometimes shutting it off will and then restarting will temporarily remedy the situation, but it eventually fails completely within a few days. I've noticed both times that within a few hours of this part failing, the idle speed gos up to about 1200 RPM. The mechanic says there is nothing that he knows that may be causing this except part failure, and of course the part only has a 12 month warranty on it and Dodge offered no help.
Thank,
Monte

 

can't help with what may be causing the problem but I do know that you can order that part from dodgeparts.com for $331 plus shipping...

 

Is this the same thing as the APPS?

 

yup... if you ask Dodge for an APPS, they'll look at you with glazed over eyes and ask if you can show them on a picture.

 

I bought mine at Cummins South Plains for $336 and it took about 15/20 min to install it.

 

it took the dealership $160 worth of time to install it:-).
What does APPS stand for?

 

APPS = Accelerator Pedal Position Sensor

 

Accelerator Pedal Position Sensor...

I had one go out on my truck unexpectedly in August.... truck started bucking in every gear while driving except when I had the cruise on , two days later the CEL came on and I had a P0121... replaced it myself.

 

By bucking are you talking about a on/off surging. More in the lower RPM. Below 1700. Worse in higher gears?

Does anyone know what the full throttle voltage is on the apps. When I checked the V at the PCM it was 7V. With the apps plugged in it only give 3.5V.

Randy

 

There was a recent thread on the voltage, and I think it was suppose to be 5 volts. Do a search and you can probably find how some people calibrated it and how some blew the ECM trying to calibrate it.

 

I did read that and completed that. I took care the free travel I had off idle. It is around .5V at idle.

Randy

 

Do both the 12 and 24 valve auto trucks have these or am I thinking the TPS?

 

TPS (Throttle Position Sensor) was in the 12 valve trucks, used mainly for the transmission shift points.

APPS is in the 24 valve engines, no physical connection between the "gas" pedal and the engine.


phox

 

I'm not sure there is an accurate way to describe it.

Many people complain of a dead pedal. I certainly wouldn't describe the pedal as dead. I'm not alone in this but I have had the opportunity to experience the two most common results of a dead pedal.

In May, I finally lost my injection pump after it had been throwing a P0216 for 13 months.... The symptoms started off as none, just had the P0216 in the ECM. I finally started experiencing what I would truly consider a dead pedal. After attaining and then maintaining the desired speed, pressing the accelerator pedal produced no effect. I could bury the pedal and get no response at first; after a few seconds, the truck would take off like a rocket. It would even happen when using the cruise control. I could lose up to 10 mph while using the cruise when the 'pedal' would go dead. I had other symptoms but that's neither here nor there.

In August, I lost my APPS. It was an abrupt failure. One day the truck ran fine. The next morning I noticed that while driving normal the truck would 'buck'... the best thing I can think of to compare this to was if you were towing a car using a tow rope and the car is constantly jerking on the rope. It progressively got worse and eventually threw a CEL and a P0121. The truck ran fine while using the cruise control because it didn't need to receive a signal from the APPS. I don't consider those symptoms to be a dead pedal. I did the reset at least twice with no results and eventually put on a new APPS and cured my ills....

 

I think we are talking about the same thing here. As for the cruise control unless yours if different then mine it still uses the APPS. It has a cable that pulls it just like the pedle inthe cab. Hence why the pedle moves with the cruise.

As for the surge I thought mine may be due to MAP. It alsways seem to hapen about 4-5 pis. If I push the pedle enough to get more (or back off to get less) it would go away. I just got back from a 228 miles drive through the mountians. It does seem to be connected to a pedle position not a MAP. It does seem to be magnified by the Van Aaken. If I unplug it it ALMOST disappears. I have called them and they are getting me the numbers for the MAP sensor. I don't feel like shotgunning the $350 part.

Randy