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Discussion Starter #1
My electronic throttle warning light, ABS and check engine lights are coming on. When it happens, the engine either dies or it losses power and will not respond to gas accelerator.Max speed I can obtain is 25 - 30 MPH

Some times after the electronic throttle warning light comes on the vehicle pits, sputters and shakes. Most times it either just quits running or will not go over 20 mph.

If I stop and put vehicle in park, turn it off and restart it, the electronic throttle warning light and the ABS warning light go out, but the check engine light stays on.

I disconnect the battery to reset code computer and get rid of the check engine light. I had a local mechanic clear the codes and he told me that several of the codes were indicating the accelerator position sensor. That's why I changed out the accelerator assembly.

So far, from following suggestions in forums, I have cleaned the throttle body, replaced my accelerator sensor assembly (gas pedal assembly), changed my air filter and replaced my battery.

Before I changed the air filter and battery, this problem was happening every 1/2 mile to 5 miles. After I changed the air filter and battery, I drove 36 miles, then all 3 lights came on and engine died again. Upon restarting the vehicle, the check engine light remained on.

On this 36 mile drive I noticed that the vibration I had been having during acceleration was approx 25% of what it was before.

Any suggestions on what the problem may be?
 

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Give us your vehicle I.D. information (year, engine, etc.) and the vehicle codes and we might be able to get you started to avoid guessing and throwing parts at it.

Based on your statement about the local mechanic, it seems that he made a guess just based on the codes and did not go through the entire diagnostic procedures detailed in the factory service manual. Is this correct?
 

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Discussion Starter #3
Give us your vehicle I.D. information (year, engine, etc.) and the vehicle codes and we might be able to get you started to avoid guessing and throwing parts at it.

Based on your statement about the local mechanic, it seems that he made a guess just based on the codes and did not go through the entire diagnostic procedures detailed in the factory service manual. Is this correct?
Treegrower, that is a correct assumption.

My Patriot is 2012 2wd Latitude with 2.4 liter and automatic. The service manual is missing from the vehicle.

Mechanic did not give me the codes, I will take the vehicle back and will get the codes, write them down and provide them here.
Getting proper direction will be greatly appreciated, and I need to get this vehicle properly functioning and back on the road.
 

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Discussion Starter #4 (Edited)
Ok, 3 codes were shown: U1407, U1425 & U1424

All 3 seem to indicate / refer to a surge in the accelerator signal.

I have changed out the accelerator sensor assembly last week.

Today, when the throttle control light activated, the engine started to run rough and shake. previously it would just die or lose power and do 20 mph.

Today when it started to run rough and shake, I stopped, placed in park, stopped and started the vehicle. The check engine light stayed on, but it started, ran ok and got me home, 3.5 miles.
 

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All three Code Definitions are in the CVT Transmission Control Module section of the Factory Service Manual :

U1407-IMPLAUSIBLE ENGINE TORQUE REQUEST SIGNAL RECEIVED

U1424-IMPLAUSIBLE ENGINE TORQUE SIGNAL RECEIVED

U1425-IMPLAUSIBLE PEDAL POSITION SIGNAL RECEIVED\

Diagnostic steps, utilizing a scan tool, start out the same for all three codes:

- Always perform the CVT Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 28 - DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure)

Then, the manual takes you through the scan tool diagnostic steps to determine :

- TOTALLY INTEGRATED POWER MODULE (TIPM) CAN BUS DTCS PRESENT
- ENGINE MODULE DTCS PRESENT
- POWERTRAIN CONTROL MODULE (PCM)
- TRANSMISSION CONTROL MODULE (TCM)

For each of the 4 possible problem areas above, the manual walks you through a Yes/No process and you proceed to the next step depending what the scan tool tells you. Along the way, the manual give you areas to check, such as wiring pins, harnesses, etc.. Once you determine which of the above 4 are giving the DTC, then you proceed to that section and start a specific diagnostic process for that.....I.E., the TCM if that is where you are lead to.

There's not much more I can assist with, without copying the entire section of the Factory Service Manual.

The throttle body on these have some plastic gears in them that have been known to cause this type of symptom(s). A new one is under $250 and it IS DIY possible. BUT......without properly diagnosing the problem, you might end up wasting more money throwing random parts at the problem. What if its just one loose wire????

 

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I Googled your three codes (together) and found this link below, that has a link to the service manual page for U1425 in one of the answers:

compass: I am getting 2 lightening bolts and a traction control



Also follow this one to the bottom of the page and the guy ended up replacing the throttle body after chasing this around on his own:

http://www.justanswer.com/jeep/9rnh4-fix-codes-u1407-u1424-u1425.html

It gives a good example of the difficulty of trying to guess the problem without doing the entire diagnostic process.
 

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Discussion Starter #7
I followed the links in your last thread.

The one guy talked about programing the TCM and PCM, (I take that as the throttle control module and the pedal control module).

Is that programing only available to be done at a dealer?

I can change out the TCM myself, because I already removed the old one and cleaned it.

But because I don't have a scan tool, I am probably best off printing your response and taking it to my local mechanic who has a scan tool or if the programing can only be done by a dealer, then take it to the dealer.

Could it also be possible that after doing the test, that all that needs to be done is to have my TCM and new PCM programed and calibrated to work together?

Am I on the same page as you?
 

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I followed the links in your last thread.

The one guy talked about programing the TCM and PCM, (I take that as the throttle control module and the pedal control module).

Is that programing only available to be done at a dealer?

I can change out the TCM myself, because I already removed the old one and cleaned it.
PCM= Powertrain Control Module.
TCM= Transmission control module.
 

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I followed the links in your last thread. Could it also be possible that after doing the test, that all that needs to be done is to have my TCM and new PCM programed and calibrated to work together?

Am I on the same page as you?
Not quite on the same page. The diagnostics identify if the problem is associated to the TCM, PCM, TIPM, etc.. It might not actually be one of those computers, but a component that is run by that computer. For instance, the actual throttle body mentioned above. A defective throttle body will send bad signals to the computers. Replacing the computer won't fix the root cause. Sometimes, reflashing the computer does alleviate problems.

I don't know about what is required to program the computers, but I imagine that you need a scan tool with specific Chrysler capabilities. Supposedly you can force a relearn procedure on some of the computers that sets them back to OEM default settings, so they can relearn your driving characteristics. I studied this on the net, but it was difficult to pin it down. Some suggest disconnecting the battery for a period will accomplish this. Others claim there are methods to turn the ignition on/off in a particular sequence to do this. It is a controversial subject.
 

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Discussion Starter #10
Thanks for the Feedback

Sounds like the best thing to do, (not desirable, most expensive, but best), is to take it to my local Jeep/Dodge/Chrysler dealer were they have the scan tool that can properly do the testing and retraining.

Currently our 2016 Dodge Journey is there, but it is still under factory warranty. The Journey started similar symptoms and had it towed to the dealer. It has 31K miles, ran perfect, no signs of anything. Parked it after chruch, came out next morning g and when I started it, it was knocking and check engine lights were on, so turn it off & dealer had me call Chrysler Roadside assistance.

They have just left message that Jopurney is ready for pickup, don't know what the cause was until I call or get there. But I will trailer my Jeep there and trailer home the Journey.

Thank You for your guidance!!!!
 

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Thanks for the Feedback

Sounds like the best thing to do, (not desirable, most expensive, but best), is to take it to my local Jeep/Dodge/Chrysler dealer were they have the scan tool that can properly do the testing and retraining.

Currently our 2016 Dodge Journey is there, but it is still under factory warranty. The Journey started similar symptoms and had it towed to the dealer. It has 31K miles, ran perfect, no signs of anything. Parked it after chruch, came out next morning g and when I started it, it was knocking and check engine lights were on, so turn it off & dealer had me call Chrysler Roadside assistance.

They have just left message that Jopurney is ready for pickup, don't know what the cause was until I call or get there. But I will trailer my Jeep there and trailer home the Journey.

Thank You for your guidance!!!!
Hi JeepPains,

Sorry to hear about this! I'd be happy to follow up with your local dealership for you if needed, just PM our page with your VIN and let me know.

Andrea
Jeep Social Care Specialist
 
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