Question about 2004 Dodge Ram 2500

4 Answers

2003 Dodge Ram 2500 5.7 Hemi, Red lighting bolt on lower right of dash comes on. When this happens the motor will not pick up speed from standing start till you press the gas pedal on down, then it revs and really goes. The tach and motor is racing up and down. It will smooth out after getting up to around 30 mph. Could this be the speed sensor?

Posted by Anonymous on

  • Anonymous Jan 29, 2011

    any DTC or OBDII codes ?

  • Anonymous Jan 29, 2011

    have not had it checked out

×

Ad

4 Answers

Jeffrey Turcotte

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Dodge Master
  • 8,984 Answers

Hi, if you don't have a manual, you can get a free download here: http://www.dodge.com/en/owners/manuals/

The lightning bolt indicates a fault in the electronic throttle control. It is likely the rheostat/potentiometer in the accelerator position sensor is dirty or worn out. I have pasted info on the part below from autozone.com. If you replace the sensor, be sure to follow the calibration procedure at the end of the installation instructions. Please let me know if you have any questions and thanks for using FixYa.


Operation
The Accelerator Pedal Position Sensor (APPS) assembly is located under the vehicle battery tray. A cable connects the assembly to the accelerator pedal. A plastic cover with a movable door is used to cover the assembly.


NOTE The APPS is used only with the 5.7L V-8 engine.

The Accelerator Pedal Position Sensor (APPS) is a linear potentiometer. It provides the Powertrain Control Module (PCM) with a DC voltage signal proportional to the angle, or position of the accelerator pedal. The APPS signal is translated (along with other sensors) to place the throttle plate (within the throttle body) to a pre-determined position.
A mechanical cable is used between the accelerator pedal and the APPS assembly. Although a cable is used between the pedal and APPS, a mechanical cable is not used at the throttle body. Throttle plate position is electrically determined.
The Accelerator Pedal Position Sensor (APPS) assembly is located under the vehicle battery tray. A cable connects the assembly to the accelerator pedal. A plastic cover with a movable door is used to cover the assembly.


NOTE The APPS is used only with the 5.7L V-8 engine.

The Accelerator Pedal Position Sensor (APPS) is a linear potentiometer. It provides the Powertrain Control Module (PCM) with a DC voltage signal proportional to the angle, or position of the accelerator pedal. The APPS signal is translated (along with other sensors) to place the throttle plate (within the throttle body) to a pre-determined position.
A mechanical cable is used between the accelerator pedal and the APPS assembly. Although a cable is used between the pedal and APPS, a mechanical cable is not used at the throttle body. Throttle plate position is electrically determined.


Removal & Installation
The APPS is serviced (replaced) as one assembly including the sensor, plastic housing and cable. The APPS assembly is located under the vehicle battery tray. Access to APPS is gained from over top of left / front tire.

  1. Disconnect negative battery cable at battery.
  2. Disconnect APPS cable at accelerator pedal.
  3. Remove wheel house liner at left / front wheel.
  4. Gain access to APPS electrical connector by opening swing-down door.
  5. Disconnect electrical connector.
  6. Remove 3 mounting bolts.
  7. Remove APPS assembly from battery tray.
  8. If cable is to be separated at APPS, unsnap cable clip from ball socket. Release cable from plastic housing by pressing on small cable release tab.

To Install:
  1. Install Accelerator Pedal Position Sensor (APPS) cable to accelerator pedal. Refer to Accelerator Pedal Removal / Installation.
  2. Connect electrical connector to APPS.
  3. If necessary, connect cable to APPS lever ball socket (snaps on).
  4. Snap APPS cable cover closed.
  5. Position APPS assembly to bottom of battery tray and install 3 bolts.
  6. Install wheelhouse liner.
  7. The 5.7L V-8 engine is equipped with a fully electronic accelerator pedal position sensor. If equipped with a 5.7L, also perform the following 3 steps:
    1. Connect negative battery cable to battery.
    2. Turn ignition switch ON, but do not crank engine.
    3. Leave ignition switch ON for a minimum of 10 seconds. This will allow PCM to learn electrical parameters.
      NOTE The DRB III Scan Tool may also be used to learn electrical parameters. Go to the Miscellaneous menu, and then select ETC Learn.

  8. If the previous step is not performed, a Diagnostic Trouble Code (DTC) will be set.
  9. If necessary, use a proper scan tool to erase any Diagnostic Trouble Codes (DTCs) from PCM.

Posted on Jan 29, 2011

  • 5 more comments 
  • Jeffrey Turcotte
    Jeffrey Turcotte Jan 29, 2011

    Hi, I'm not sure why you didn't like my answer, but I'm pretty sure this is your problem. Why do you think it is not the problem? When the sensor lead hits a dead spot on the potentiometer, the PCM sees loss of signal and puts the warning light on. The loss of signal sends the throtte back to idle until you push far enough to find a live spot on the potentiometer. I know my electronics,and this is a very common failure.

  • Anonymous Jan 29, 2011

    Sorry, I'm at work now and can not check this out till later today, but I'm going to check it out, thanks. Also I don't have a manuel, so thanks for the link.
    Steve

  • pacerind Apr 01, 2011

    This has been an ongoing problem with my 2005 Dodge Ram 4X4, 5.7L HEMI. I have had 6 pedals replaced. TPS replaced. And still this lighting bolt comes on. This was all done under warranty at the Dealer. When the "safe-mode" is entered (lighting bolt flashing) you lose 5th gear and the vehicle is apt to stall on Xpressway offramps. After all these failed attemps they sent me to their sister-dealership, a Jeep Chrysler dealer. Where a Mechanic with 40 years experience worked on the Truck. He seemed to think that the connector at the TPS was bad. So he used a "Factory Harness Fix Kit" to re-do the connection at the TPS. Then he drove my truck around for 2 days and smoked butts (thaks for the stench) in it to make sure he fixed it. His repair lasted about 6 months, and guess what. IT'S BACK! Still a no fix. I HATE THROTTLE BY WIRE! I am now going to look into fixing it myself. What do you think jturcotte?

  • Jeffrey Turcotte
    Jeffrey Turcotte Apr 01, 2011

    well, you made me read all the recalls and TSBs, but there is nothing on this problem. Clearly there is a design flaw or they are making these pedal sensors wrong. What I would do is check the impedance of the sensor as the pedal is pushed to see if it's working right. It should be changing smoothly as the angle is increased and should not have any drops or spikes. Then I would check the same signal at the computer to see if the connectors are bad. I would like to get my hands on this truck to check it out. Will you be my Avatar? Are you good with a meter?

  • Steve Garrison Oct 15, 2013

    I get the red lighting bolt then no power, no lights, truck wont even turn over, any ideas? I did have my battery leak acid that ate thr my throttle cable.

  • Jeffrey Turcotte
    Jeffrey Turcotte Oct 15, 2013

    This is a very difficult problem to solve online. I'm assuming you repaired/replaced the wires that the acid got to. Did you trace them both directions for damage? I once found a short under the relay box that was caused by high current. If the acid caused a temporary short, whichever wires got that current may have melted insulation somewhere that could cause an intermittent problem. My guess is, the sensor wire is shorting against something that is setting a breaker. Does power come back after a while? Can you tell me more about when it happens and when it resolves? I will look at the diagram again.

  • Ronald Tabb
    Ronald Tabb Oct 26, 2018

    What is the part number for the accelerator pedal position sensor?

×

Ad

James Putnam

  • Level 1:

    An expert who has achieved level 1.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Contributor
  • 1 Answer

My 2003 dodge 5.7 Hemi had same problem I ended up replaceing Throttle Body Control which actually receives signal from TPS. Dealer was no help didn't know what I was talking about so had to take it on chance and special order. This was a problem when I bought truck used but happened only on freeway after about 3 hrs on trips. Over couple years progressively got worse until it would exhibit problem almost every time I drove it. Wasn't cheap part but easy to install and hasn't happened since.

Posted on Feb 04, 2012

×

Ad

Mark Dybedahl

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Before you replace any parts like I did, I spent $1500 on a new throttle body and computer and still did not fix my issue. Spent $2 on a new grounding strap from the valve covers to the block and that fixed my problem. I also replaced a couple of badly corroded coils due to the grounding strap being broken.

Posted on Jul 12, 2015

Toni Snyder-Wilson

  • Level 1:

    An expert who has achieved level 1.

    New Friend:

    An expert that has 1 follower.

  • Contributor
  • 1 Answer

This is actually not a solution but an addition to the question...my 2004 dodge ram 1500 5.7l hemi is having the same problem, however no one seems to be able to provide the part. one dealer told me i had to buy a new throttle body in order to obtain the throttle position sensor and another one said they arent the same (which i figured) and ordered a new pedal assembly only to find out that the sensor is not included on the assembly. with this being an issue and by my research a pretty common one at that, why can i not seem to find out how or where to purchase this part????? thanks!

Posted on Mar 26, 2013

  • 2 more comments 
  • kyle imwalle
    kyle imwalle Oct 31, 2013

    the tps is attached to the the throttle body of the 04 hemis, there are two things that can cause the lightning bolt, one is the tps, the other is the accelerator positions sensor (APPS)

  • James Putnam Nov 07, 2013

    Not surprised with dealer response parts counter people not that sa

  • James Putnam Nov 07, 2013

    Oops hit return... meant to say not too helpful. The Throttle Position Control actually responds to control engine speed thru throttle body. It is only available as an assembly. Don't recall if I mentioned but once replaced the TPS and TPC had to be synchronized with an engine analyzer. Basically pretty simple if you have access to one just depress accelerator as instructed with engine not running to reprogram accelerator range. 2003 5.7 Hemi 2500.

  • Taylor Thompson
    Taylor Thompson Jan 31, 2016

    On an 04' ram hemi the apps is located under the battery tray. The only place other than the dealer I've been able to find this part is a company called bellcrank. Its a fairly spendy part but I think you'll save about 100 bucks buying it from bellcrank

×

Add Your Answer

×

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

4helpful
1answer

I have a 2004 dodge ram 2500 with the 5.7 Hemi. The volt gauge on the dash is slowly increasing, but still in the normal range. What is causing the volts to increase?

Increased voltage is typically a result of a lowered state of charge. If your voltage is 13.8 to 14.6 it is normal. Be sure that the water is up in the battery and all connections are clean. Iights, fans, compressors, accessories at lower engine speed draw down the battery, and this is normal and okay.
Short trips draw down the battery. All of this is pretty normal and not to be concerned about.
1helpful
1answer

How do you get a dodge 1500 2003 heater core out?

Well if your 1500 is any thing like my 03 2500 hemi 4+4 then you need about six hours of free time. The heater core is behind the passenger side dash area you have to first begin to take the front dash all the way apart and I mean all instrument cluster drop steering wheel from middle support bracket after that you will disconnect the ac lines into firewall this is not easy task but can be done with specialty ac tool then in both sides passenger four bolts on each side take those the whole dash can then be pulled back far enough to take two hoses of heater core and in engine compartment four bolts hold it in then follow steps to install
1helpful
1answer

My 2003 dodge ram 1500 5.7 hemi has the engine light come on then the fuel gage went to E next the electronic throttle control light come on flashing. After the etc light came on i had a loss of power. I...

I had the same problem with my, 03, hemi. I did not wait 15 min. turn off and back on was all that was needed to reset, "red flashing light lower right hand ". though another 8 or 9 on off's, Engin Light also goes off, untill next time. All i did was pulled off my Air Intake box and hose, so i could get to butterfly on throttle bodie, sprayed carb cleaner in there. and it was very dirty. after put back togather, give it a few.... mine did not start right up, when it did idle real ruff even died few times...Once the computer re adjusted ran like it did when i bought it....that was 2 weeks ago, still no eng light, no flashing red ones either.
0helpful
1answer

2006 dodge quad cab blower motor squeak

take out the glove box then on your right side you will see the blower motor housing. it has 3 chrome bolts unscrew those sometimes things get in there-the other day my blower motor was vibrating there was a napkin in there-any questions email me and i will give you my cell so we can talk if any questions thanks brad
0helpful
1answer

I have a 2003 Dodge Ram Hemi. An amber light in the upper left dash and a flashing red light in the lower right is displays periodically. When this happens the engine runs very rough and wants to cut out...

use the warranty, if you get someone to poke around it could void the warranty.
Red fluid is normally transmission fluid, sometimes power steering. Is the fluid oily or watery, some brands of antifreeze are red.
A flashing check engine light means that you are doing harm to the catalytic converters.
I would have this checked immediatley, a customer of mine waited too long and although the dealer warrantied the error, they would not cover the cost of replacing the converters because it was not their fault he kept driving it, it was a $ 2500 lesson
0helpful
1answer

The red flashing light with the lighting bolts comes on and the check engine comes on. The engine seems to lock in the current gear.I can stop and restart engine and it returns to normal. John

John, is this an Hemi 5.7 truck 2500, and the ETC, MIL lights flash or stay on, then you have a sofware issiue with the PCM, DTC code will probably be, throltle reached forced limit, this can be only be fixed at your Dodge dealer, common problem 2003-2005 model years, also Tsb requires soft ware update to PCM, might under warranty depending on year of your truck. GOOD LUCK. RDJRP
6helpful
2answers

2003 Dodge Ram 1500 Fuel Gauge drops to empty while driving.

I have the same problem on my 2003 Dodge Ram 2500 5.7 Hemi. Also the gauge is sometimesslow to register after filling. Maybe 5 minutes.My neighbor has the same poblem with his 1999 Durango? I think this is a job for a recall.
1helpful
1answer

Knock Sensor location on a 2004 Dodge ram 1500 5.7 hemi

2 knock sensors are used..small black plastic sensor bolted into engine block below each exhaust manifold..be careful not to over torque bolts upon installation
1helpful
1answer

2003 dodge hemi 2500 wont start

You probably spun a main bearing
Not finding what you are looking for?
Cars & Trucks Logo

18,860 views

Ask a Question

Usually answered in minutes!

Top Dodge Experts

Greg Bernett
Greg Bernett

Level 3 Expert

2993 Answers

Thomas Perkins
Thomas Perkins

Level 3 Expert

14871 Answers

Mike

Level 3 Expert

4377 Answers

Are you a Dodge Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...