2008 Jeep Cherokee U0101 Loss of Communication with Transmission PLEASE HELP - Jeep Garage - Jeep Forum

Go Back   Jeep Garage - Jeep Forum > Site Information > New Members - Welcome!

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #1  
Old 01-06-2015, 08:01 PM
New Member
 
Join Date: Dec 2014
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
pstefura is on a distinguished road
Angry 2008 Jeep Cherokee U0101 Loss of Communication with Transmission PLEASE HELP

Hello all, I have a 2008 Jeep Cherokee LAredo, About 2 months ago the check engine light, traction control and other dash lights came on and the car wouldnt shift out of 1st gear or go over 25mph. I brought it to a shop and they said it was either a wiring short or a bad relay. they couldnt locate the exact problem, reset the computer and gave me the car back to me. The car ran good for about 2 days and then the problem occured again. The computer code that comes up is U0101 which indicates loss of communication with the transmission. After research i think it may be a short in the transmission relay, which i cannot find or even confirm that 2008 jeeps have one. I have been driving around town for the last month or so 25mph. I am going crazy and trying to figure out the problem with the jeep through web research but have had no luck. Any help would be greatly be appreciated as i understand this has happened to many jeep owners but i cannot find a find a solution. I am worried to bring it to several mechanics to only get the same 2 day fix and spend lots of money. thanks for any help!!!

Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old 01-06-2015, 10:43 PM
Frango100's Avatar
The beast from Brazil

My Jeep: 2004 4.7L WJ
 
Join Date: Dec 2009
Location: Brazil
Posts: 7,267
Thanks: 17
Thanked 366 Times in 353 Posts
Rep Power: 529382
Frango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond repute
Re: 2008 Jeep Cherokee U0101 Loss of Communication with Transmission PLEASE HELP

Welcome to the garage.
If your jeep as the 3.7 L engine, then it has a transmission relay on the junction block. If your jeep is the 4.7L or 5.7L, then it has a transmission control relay in the PDC under the hood.
I would first inspect all wire bundles in the engine bay for shaving and clean the PCM/TCM connectors. Any wire break or bad contact in a connector due to moisture/corrosion, could give this problem.
__________________
Frank

JEEP Grand Cherokee 4.7 Lmtd 2004
HID 8000K in low and fog / Quad Squad member
KYB Gas-a-Just shocks / Pirelli Scorpion ATR 245/65/17 - Transgo reprogramming shiftkit.

VW Beetle 2.0 TSI 2013
My new toy
Reply With Quote
  #3  
Old 01-07-2015, 09:36 PM
Member
 
Join Date: Aug 2011
Posts: 141
Thanks: 0
Thanked 9 Times in 9 Posts
Rep Power: 2084
limitEd1 is on a distinguished road
Re: 2008 Jeep Cherokee U0101 Loss of Communication with Transmission PLEASE HELP

Welcome and hope you get your situation solved


Sent from my iPhone using JeepGarage
Reply With Quote
Reply

Tags
2008, jeep

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
2006 Grand Cherokee Laredo lost communication with the TCM again! Oscarq Troubleshooting/Problems 19 07-24-2016 04:09 PM
Jeep needs better internal communication bill_de Grand Cherokee - WK2 - 2 08-21-2014 02:56 PM
Complete loss of power when accelerating please help 1994 Jeep Grand Cherokee ChefAsh Grand Cherokee - ZJ 10 05-15-2013 09:02 PM
2205 jeep grand cherokee tcm no communication mag5313 New Members - Welcome! 2 11-14-2012 09:22 PM
Transmission and loss of power on cruise control? RUDEZ Grand Cherokee - WK 2 02-13-2011 11:37 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 04:47 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community

JeepGarage.org is in no way associated with or endorsed by FCA US LLC. Chrysler, Dodge, Jeep, Ram, Mopar and SRT are registered trademarks of FCA US LLC.