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My truck keeps going into Limp Home Mode - Help Needed

2009 - 2014 F-150

My truck keeps going into Limp Home Mode - Help Needed

 
  #16  
Old 05-12-2014, 09:20 AM
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Join Date: May 2014
Posts: 3
Originally Posted by FordService View Post
Hi tstalontsi,

How many miles do you have on your truck?

Ashley
My truck has about 91k, however I've own the truck since it had about 61k and the problem has always been present during the colder months.

Thanks!
 
  #17  
Old 05-12-2014, 12:36 PM
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Join Date: Oct 2010
Location: Dearborn, MI
Posts: 806
Originally Posted by tstalontsi View Post
My truck has about 91k, however I've own the truck since it had about 61k and the problem has always been present during the colder months.

Thanks!
Let me see how I can help, tstalontsi. PM me your name, phone number, VIN, and the name of the dealer you had take a look.

Ashley
 
  #18  
Old 07-21-2014, 09:57 PM
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Originally Posted by FordService View Post
Let me see how I can help, tstalontsi. PM me your name, phone number, VIN, and the name of the dealer you had take a look.

Ashley
Sent. Thanks!
 
  #19  
Old 01-22-2015, 07:38 PM
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Join Date: Oct 2011
Location: Ontario Canada
Posts: 11
Any resolution, I am also experiencing a LMH and code U0101 loss of connection with TCM. 09 Screw 4x4 200,000KM roughly 120,000 miles. After clearing the codes, all seems well for about a week then U0101.
New battery Oct 2014, at 188,000km roughly 2 months ago. First LMH Oct 2014, at 189,000 right after bulk head connector replaced. Mechanic reseated connector. Next one last week Jan 2015 (Mechanic could not find anything) and now one this week (didn't take to mechanic).
 
  #20  
Old 02-02-2015, 12:43 AM
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Join Date: May 2010
Posts: 18
Signing in. My '09 SCrew 5.4L has had a U0073 twice now in the last month. Both times, it seems like it's searching for gears. Only have about 40k miles on the truck.

The O'Reilly database suggested replacing the "right wheel speed sensor." Not sure what I'm going to do yet. I have my doubts about taking it in for service since it's so difficult to reproduce. Yet, when it happens, my truck is basically not driveable.
 
  #21  
Old 02-05-2015, 10:51 AM
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Join Date: Feb 2015
Posts: 1
I have a 2010 that keeps going into LHM. The computer showed the TPS/Peddle position error. I have replaced the throttle body and TPS and the peddle position sensor and the truck is still going into LHM. It might drive fine for a couple days our it might go in LHP 5 times in 2 miles. Any ideas anyone?
 
  #22  
Old 10-09-2018, 11:08 AM
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Join Date: Oct 2018
Posts: 1
Same

Originally Posted by TriciaJ2 View Post
I have a 2010 that keeps going into LHM. The computer showed the TPS/Peddle position error. I have replaced the throttle body and TPS and the peddle position sensor and the truck is still going into LHM. It might drive fine for a couple days our it might go in LHP 5 times in 2 miles. Any ideas anyone?
I literally have the same problem...replaced throttle body, abs sensor, and tps...drove good for about 800 miles...then back to limp mode... i was wondering if you ever got your problem resolved?
 
  #23  
Old 10-29-2018, 08:41 PM
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Join Date: Oct 2018
Posts: 4
MAF Sensor

Originally Posted by F150kingranchb View Post
I literally have the same problem...replaced throttle body, abs sensor, and tps...drove good for about 800 miles...then back to limp mode... i was wondering if you ever got your problem resolved?
Try cleaning your Mass Airflow Sensor. Itís right by your air filter, on the air intake duct. Very simple to do. Two screws, and use MAF sensor cleaner only. Do you have a K&N filter? I do, and I sprayed way too much oil on it, and it messed my Sensor up. Wrench/LHM etc, until I cleaned it.
 
  #24  
Old 11-10-2018, 09:42 PM
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Join Date: Oct 2018
Posts: 4
Not MAF Sensor.... found my intermittent problem.

Originally Posted by DDD3_24 View Post


Try cleaning your Mass Airflow Sensor. Itís right by your air filter, on the air intake duct. Very simple to do. Two screws, and use MAF sensor cleaner only. Do you have a K&N filter? I do, and I sprayed way too much oil on it, and it messed my Sensor up. Wrench/LHM etc, until I cleaned it.
It came back, and always very intermittent. I only had U0073... not communicating. Didnít have any other codes. I had my ODB II connected, and kept clearing code on the fly. I realized itís a loose connection or intermittent short in the signaling. I checked all connectors, underneath the truck, and in the engine area. Looked for shorted wired to metal. Nothing underneath. So I looked at wire harnesses that were laying on some type of metal. Close to ECM, there was a wire harness laying on AC return line, which gets hot while AC is on. I lifted to see underneath and it was melted and a couple of wires were arcing on the return line. I fixed the issue, and rerouted the harness, and cut a piece of heater hose, and placed it on the return line. Finally!!!!! No more crazy dash lights, LHM. Iím wondering if Ford had an issue with the routing of this harness laying on the AC return line. I hope this helps you guys. I had taken it to Ford, and could find nothing... lol let me know if it helps with your crazy lights and LHM issue.
 

Last edited by DDD3_24; 11-10-2018 at 09:46 PM.
  #25  
Old 01-25-2019, 12:20 PM
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Join Date: Jan 2019
Posts: 3
Good afternoon,
Could you share a photo of the wire you had issues with?? I have similar issue on my Expedition truck.
Thanks!!
 
  #26  
Old 01-25-2019, 02:57 PM
Junior Member
Join Date: Oct 2018
Posts: 4
Find your AC return line....

Just find your AC return line and follow it back towards the firewall, and see where the wiring harness touches it. Iím sure itís not the same as my 2010 F150.
What codes are you getting ?


Originally Posted by Mel Ford Owner View Post
Good afternoon,
Could you share a photo of the wire you had issues with?? I have similar issue on my Expedition truck.
Thanks!!
 
  #27  
Old 01-25-2019, 05:48 PM
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Join Date: Jan 2019
Posts: 3
Originally Posted by DDD3_24 View Post
Just find your AC return line and follow it back towards the firewall, and see where the wiring harness touches it. Iím sure itís not the same as my 2010 F150.
What codes are you getting ?


Thank you for the quick reply.
Mine throws multiple codes with the following U0100 Lost communication with TCM and U0101 lost communication with ECM/PCM "A'. My issue is in winter only, after i run my truck for some 15-20 mins. It goes on limp mode (stuck on 1st gear), and i get multiple warning lights : wrench, traction control, fuel gage low, check rear park brake, speedometer doesn't read speed. But if i shut off engine for 15-20 mins, it will go back to normal shifting except ECL illuminates. Very frustrated with it!!
 
  #28  
Old 01-25-2019, 06:04 PM
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Join Date: Oct 2018
Posts: 4
I was very frustrated as well. Does it operate ok when it warms up? It sounds like

Itís something similar to mine. Check the connector at the TCM, and then check the wiring for melted plastic flex line, or just rubbed wiring that is shorting to ground. Mine had melted and you couldnít see it, but when I lifted off of the AC return line I saw where it had melted, and a couple of wires were barely making contact with the return line. Sound like your 5 volt signaling like mine was. It was so intermittent it was driving me crazy. Ford couldnít fix it lol. You have to go check your wiring. Itís as simple as that. Start with the section that goes to the TCM. Check the connector as well. Make sure itís making good contact.
Originally Posted by Mel Ford Owner View Post
Thank you for the quick reply.
Mine throws multiple codes with the following U0100 Lost communication with TCM and U0101 lost communication with ECM/PCM "A'. My issue is in winter only, after i run my truck for some 15-20 mins. It goes on limp mode (stuck on 1st gear), and i get multiple warning lights : wrench, traction control, fuel gage low, check rear park brake, speedometer doesn't read speed. But if i shut off engine for 15-20 mins, it will go back to normal shifting except ECL illuminates. Very frustrated with it!!
 

Last edited by DDD3_24; 01-25-2019 at 09:12 PM.
 


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