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Discussion Starter · #1 ·
Hey all,


Just got these 2 messages in my EVIC and the warning light:
Service electronic throttle control with associated warning light.
Service 4 wheel drive system

The coolant system needle dropped to zero. Will go get the codes read tomorrow in the morning when the stores open.

Love this Jeep but man they seem to have a never ending list of problems..

Any ideas and has anyone else had this happen?

Tay
 

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Discussion Starter · #3 ·
2014 wk2 ecodiesel overland
125k miles.
It didn’t go into limp mode. I felt the car kinda buck and then it shut off the Adaptive cruise control watched the temp needle fall and shut off the traction control as well.
 

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Discussion Starter · #4 ·
So today let the car sit until just now. All issues gone and runs perfectly fine.

Yay keep..
 

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Likely a loose connector in the wiring harness. The temporary loss of comms will cause all sorts of error codes.
I agree with Bounty Hunter. I had the same symptoms you had on my 2008 JGC 3.0 CRD... for sure a different beast, but similar in some regards.


The dealership first replace the transmission control module (TCM) because of codes found in several other modules pointed to no communication with the TCM. This was about $500 including labor.


Things seemed okay for 9 months during the warmer months, but when the next cold season hit the problem came back. This time shutting the car off and back on was not clearing all issues and I could not clear the service 4WD message.


I disconnected the transfer case motor connector and found that one of the male pins was not seated properly within the plastic molded injection housing. This one pin was freely sliding in the housing and for sure it was not mating properly with the female receiving socket at all times... it probably depended on vibrations, temperature, oxidation, ect...


To make a long story short, even after securing the pin properly into its plastic housing, there was obviously a problem now with the transfer case motor. I replaced the entire motor which included the defective plastic molded injector housing and all has been fine for 5 months. It was about $700 including labor.


I am not certain whether there's anything inside my CRD's transfer case motor on the CAN bus, but that pin making and breaking electrical continuity causes a severe "electrical storm" that damaged my transfer case motor and could easily cause enough electrical noise to interfere with communication components in proximity.


Just my 2 cents.
 

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Discussion Starter · #7 ·
Whelp looks like this one will need to go to the shop.

The warnings popped up in the evic again and all the same symptoms happened.

Disconnected the battery for a few hours then hooked it back up and ran for about 10 minutes in park in the driveway. That’s when it all happened again. Jeep shook a few times then RPM dropped to just under 1k to just over half, and the evic notifications came service electronic throttle control, service 4wd system and the temp needle dropped to zero,

Not a clue what’s wrong...
 

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Whelp looks like this one will need to go to the shop.

The warnings popped up in the evic again and all the same symptoms happened.

Disconnected the battery for a few hours then hooked it back up and ran for about 10 minutes in park in the driveway. That’s when it all happened again. Jeep shook a few times then RPM dropped to just under 1k to just over half, and the evic notifications came service electronic throttle control, service 4wd system and the temp needle dropped to zero,

Not a clue what’s wrong...
Hi AFSSgt,
We understand why this may be frustrating. If you are planning on visiting your dealer to have this address, please feel free to send us a private message and we will gladly assist with this process.
Lydia
Jeep Social Care Specialist
 

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Has happened to me a few times. The first 2 times it re-set itself by turning the vehicle off a couple of times. Did go into limp mode when coming back from the desert. That's when I got the reader and torque iPhone app to clear it. After clearing it, the problem hasn't recurred.
 

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The butterfly valve has been know to fail it will intermittently keep throwing those codes till it totally goes and puts it in limp mode every time my 16 did it
 

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Discussion Starter · #16 ·
Update


Was isolated down to a coolant temperature sensor. Was replaced under the new ecodiesel settlement warranty!

New code EGR cooler or something like that. It will also be covered under warranty going to take it in Monday! This all keeps up I will get the buyback option...
 

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Update


Was isolated down to a coolant temperature sensor. Was replaced under the new ecodiesel settlement warranty!

New code EGR cooler or something like that. It will also be covered under warranty going to take it in Monday! This all keeps up I will get the buyback option...
Any update on this? I'm in Australia and have the same problems with my 2014 Diesel Overland. Based on the comments here I had the engine coolant sensor replaced by a private mechanic 2 weeks ago. That has really poked the bear. It's happened 5 times since, whereas happened about 5 times in the previous 2 years
 

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Discussion Starter · #19 ·
For me this particular issue was resolved with the replacement of a confirmed bad temp sensor. The dealership as far as I know troubleshooted to that particular item. Tested it confirmed it was bad and ordered a replacement. My new issues stem they think I guess from the US AEM update. Or the AEM update somehow brought front and center. But that’s a discussion for another thread...

good luck with your Jeep. I love this vehicle and Jeeps in general but man I need reliability.
 

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For me this particular issue was resolved with the replacement of a confirmed bad temp sensor. The dealership as far as I know troubleshooted to that particular item. Tested it confirmed it was bad and ordered a replacement. My new issues stem they think I guess from the US AEM update. Or the AEM update somehow brought front and center. But that’s a discussion for another thread...

good luck with your Jeep. I love this vehicle and Jeeps in general but man I need reliability.
Thanks for the update, I too love the car, but this is very frustrating. Could you please clarify, did the replacement of the temp sensor fix all of the problems you reported in the first post

Service electronic throttle control with associated warning light.
Service 4 wheel drive system
The coolant system needle dropped to zero.


or just the last one
 
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