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Robert R
Robert R, ASE Certified Master
Category: Dodge
Satisfied Customers: 4538
Experience:  Dodge Master Certified, Dodge Sprinter Certified
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I would like to hear from a dealer or certified mechanic

Customer Question

I would like to hear from a dealer or certified mechanic with experience with a 2005 dodge HEMI 5.7
3 hrs. into our trip today this car did not want to run, I have a flashing red lightining bolt on the dashboard and have a code P2127 TPS switch.
one month ago it did the same thing and had two codes the first one was for a faulty EGR valve, I replaced that with a new dealer part and the car was running good again up to today?
Submitted: 2 years ago.
Category: Dodge
Expert:  Robert R replied 2 years ago.

Hello, welcome and thanks for asking your question. My name is*****'m a Certified Auto Technician with 28+ years experience. I will do my best to assist you. please keep in mind that I may need to ask questions of you before I can answer. When you reply please feel free to add as much detailed information as possible pertaining to your concern.

At this time, it is looking like you will need to diagnose the APPS Sensor Circuit (accelerator pedal position sensor).

Most likely, the sensor itself is faulty and needs to be replaced but it is also possible that there is a wiring issue or the PCM has failed.

I'm going to post the diagnostic procedure for you. If you have the knowledge and tools, you can perform this procedure yourself. You may need a scanner for some tests but may be able to get around using the scanner if one is not available...

Attachment: Click Here

Keep me posted and let me know if you have any additional questions...

Thank you,



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Customer: replied 2 years ago.
Robert, what are the chances i need a part before the dealer closes today? Throttle body? or a sensor? I think id like to do test 11 on your flow chart th test the throttle pos. and do the sweep test but the plug ends on your chart are different then on the car. The plug end of the throttle body on my car uses 6 pins. Or are we not on the same part.
Thx. Jack
Expert:  Robert R replied 2 years ago.


Actually, the Accelerator Pedal Position Sensor is part of the Accelerator Pedal assembly. This is inside the vehicle attached to the gas pedal. This is sold as an assembly that included the Accelerator pedal and the APPS. see below

Attachment: Click here--to view

If the APPS is bad you will need to replace the Gas Pedal Assembly...

Thank you and let me know if you have additional questions...



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Customer: replied 2 years ago.
Robert, are you there tonight?
Expert:  Robert R replied 2 years ago.


Yes I'm on and off today, if you have any questions please post them and I'll answer asap...

Thank you,


Customer: replied 2 years ago.
OK, so i made it back home with p2127 (240 miles) with no cruise control or overdrive. I did receive your flow chart but not sure where to start. I think i can test the throttle valve and accelerator pedal sensor using a dvom? but i do read about also having to use a scan tool or other fancy device that i do not have. Is there a common part that goes bad with this code?
Expert:  Robert R replied 2 years ago.

Correct, you can run the testing with a DVOM. You can follow this chart I posted from the beginning and assuming that the code is active. Run all the wiring checks and if they all pass you can safely assume that the APPS is faulty. This code does not refer to anything on the throttle valve, you will just be testing the accelerator pedal sensor with this flowchart.

For the most part you can get around using the Scanner and use the DVOM to check the voltages when requested.

As for a common failure, I would have to say that the APPS itself would be the most common failure. If you don't want to run through the flowchart, I would probably start by replacing the APPS and go from there...

Keep me posted and let me know if you have any additional questions...

Thank you,


Expert:  Robert R replied 2 years ago.


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