Causes and Fixes U0101 Code: Lost Communication with TCM (Transmission Control Module)

[@adamkelly6264]

mate I just wanted to let you know these three videos saved me from pushing my amarok into the f*cking sea. Thanks!

[@shantwil]

Lolol!!😂😂😂

[@wagner55]

I’m about to light my Camry on fire, checked and cleaned all ground wires even bridged one ground to make sure, cleaned tcm terminals, replaced abs sensors on two front wheels, the last thing I’m doing is replacing the alternator we’ll see.

[@Jim-re3sr]

2006 4.6 explorer. Failing coil pack interfered with pcm to tcm. Harness travels next to coil. Replaced coil pack solved the issue. Great video

[@katyreesimpson8742]

Just saved my ass thank you!!!

[@americanpatriot5836]

What was your problem just curious?

[@adanlopez1011]

Are you serious. So this code can be caused by anything? I did an all module scan on my car, and most of the faults are coming from the BCM hopefully it’s just water and my BCM doesn’t t have to be replaced or reprogrammed.

[@fred21679]

2019 GMC Elevation...My truck just wouldn't start and after a jump the check engine light came on and was throwing this code. I didn't have any problems before, and it wouldn't hold a charge after. I put a new battery in it, and it took care of my problem. Check engine light went off and it went back to normal. I know this won't help everyone, but it may help someone! Good luck!

[@VegasModel]

Hey I want you to know I really appreciate this video I've been trouble shooting my TCM for months after all this removing soldering etc and fixing it myself it would only be temporary.. but now I know why. Thank you.

[@stevelatronica6025]

after a rebuild on the 4L60E transmission, its now throwing two codes P0826 and U0140. Any ideas? Thanks for the awesome videos!

[@Elcapulove]

Good afternoon family and good health to everyone especially MENTAL. Thank you very much. 🙏

[@djfazher]

Thank you for the information!

[@xPlzid]

So my headlights low beam was flickering when this happened, fixed some shorts, there was a blown fuse that I have now fixed. Can’t find anymore shorts and the grounds on my car have been cleaned and everything. Have had water leak in to the passenger side where the ax blower motor is at and where the ecm seems to be located at. Will be replacing ecm and inspecting harness to make sure but this has really been a nightmare on my already pos g35

[@americanpatriot5836]

I have a 2002 infiniti i35 with driver and passenger side floor board soaked and can’t find where its coming from and also a hard shift into 2nd gear sometimes.

[@TyrellDavis-ye3rn]

Hey got a 2013 Chrysler town and country changed the tcm in the tranny but still in limp mode and still showing lost communication.. all fuses are good .. are there any other solenoids or sensors there that would cause This ?

[@danamcintyre3565]

For starters that one of the biggest reasons I don't work on these late model cars, unless you have been schooled on it or have just enough knowledge to understand what does what, you better off taking it to a professional to have it fixed !

[@rafyperalta9246]

Thanks I was able to solve the problem with this video

[@FernandoFlores-ry2iw]

What was wrong with yours

[@Vtoq]

2014 Chevrolet Captiva - Check engine light would occasionally come on and eventually received U0101 code. Still looking for solution, most likely think it is a blow fuse since battery was just replaced and issue is still ongoing even before changing the battery.

[@incith]

Look at the fuses then?

[@tammi-u3s]

I just replaced the battery and alternator on a 2013 Kia Soul 1.6l and now it won't shift out of 1st. Any ideas??

[@asaadahmed1738]

Useful ..thank you❤

[@sr25jd]

Had the battery out of a 2011 Lin Navigator for about 1 year replaced started and then the anti theft system the person that worked on the Lin prior had removed fuses I replaced those now the gear shifter won’t come out of park I replaced the brake light switch and still won’t come out of park

[@MichelleBartlett-zm8cg]

I keep getting this code then it goes off then back on then off again. Any idea what that could mean?

[@newprep3661]

2013 impala. Very low power, not shifting to high gear, random electrical issuesfilters and fluids are fine. Reving to 3000 rpms at startup, any thoughts?

[@incith]

"random electrical issues"

[@davepatt6018]

Thank you for the info

[@kwamepaul4418]

can u0101 and u0402 DTC be the transmission failure. its in limp mode in forward gears and reverse takes about 80% pedal pressure to move.

[@HVAC_Mechanic]

It is possible, but more likely, there is a power or wiring issue or an issue with the TCM.

[@Sebastian-dx2xg]

I’m getting a parasitic draw from my TCM-BATT fuse. It’s draining my battery. But I’m not experiencing any shifting problems

[@adamcervantes9248]

Did u get any update? My denali keeps draining my battery and its throwing this code out

[@henm4975]

CURRENTLY dealing with this on my 2014 3.6 impala, it fuking sucks......i have no way of diagnosing but by checking the wires for resistance/continuity.....every module, every wire, every connector.....so far all my 2500, 2501 circuits are good....i hope its an easy wire fix. i lost 6k on a transmission shop that just started swaping the most expensive prts hoping for the best, next thing you know, i get U0101 for the 3rd time.....they say dont bring it back. had they done their job and proper diagnosis I coud be working.

[@d-blareo8018]

I had an APR ecu flash on Thursday on a 2012 Audi A7. I drove the car home fine. I put the car cover on, and let it sit until Saturday. I got in it and drove down the street, stopped to check the mail, and it wouldn't go back into gear. The battery was replaced by the previous owner in November of last year, the fuse for the transmission is good, and the car starts fine. I used by BlueDriver and got the U0101 code along with 35 other codes. All of the codes cleared except the U0101. Any idea if the ECU upgrade may have caused the TCU to fail? Do you know if the TCM is disconnected during an ECU flash?

[@mikey13b]

Did you end up finding the cause of the fault code?

[@Alexmanzophxsuns]

I have a jeep 2006 it showing transmission over temp but I waiting for my new computer to come hopes it works

[@Linorodarteofficial]

HVAC MECHANIC I have a 2016 Jeep Grand Cherokee Srt with this very same code have little to some knowledge on mechanics, went uder the hood to find out my fuse #f60 was blown switched it out with a new one and the new one blows as soon as it touches the terminals. May you please point me in the right direction as this is my only means of transportation at the moment to get to and from work. Thanks in advance 🙏🏻

[@HVAC_Mechanic]

There is likely a wiring issue, which can be hard to diagnose. You can check for any obvious signs of wire damage otherwise a wiring schematic for the vehicle and a meter are needed to diagnose it.

[@MegaNeet7]

I have an issue with a Chevy Cruz like this I can reverse at full speed, but when I go into gear, it starts slow. I’ve actually moved the car because I had to move and I didn’t wanna pay a towing service and I drove it 6 miles with a friend in front and a friend and back and once I got up to speed about second third, it was all right. I didn’t try to push it anymore than 48 miles an hour, but all in all I’m just trying to figure out what direction to go with this because I’ve replaced coil packs. I’ve actually replaced the engine catalytic converter radiator almost everything on a car so I’m just kind of lost.

[@HVAC_Mechanic]

It sounds like it is in Limp Mode. There should be codes that point to the issue. If the code is a U0101, then it can be hard to troubleshoot.

[@MegaNeet7]

@@HVAC_Mechanic that’s exactly it and I found in the front end of my transmission that’s where the Tcm i’m not the most knowledgeable on cars, but when I called a transmission shop, the guy was trying to tell me that mines was inside. My transmission wouldn’t that technically mean it’s mounted on the outside legit like behind my radiator fan On the driver side

[@HVAC_Mechanic]

The TCM can be located inside the transmission and be built into the valve body. If you think it is a computer issue, before replacing it, I would be sure to check all the wiring, fuses, and be sure the alternator is charging correctly. Like I said though, this code can be hard to fix.

[@MegaNeet7]

@@HVAC_Mechanic boss went and got myself a Kaykay five 2025. I still have the Chevy paid it off. Had the transmission place and send it to a specialist but even he couldn’t get it to pair with the engine again but then when I got it home and had it towed I actually was able to drive it around for a bit full power shiftingmanually and automatic because I have the hybrid shifter but all in all after a while and went back into it so I’m starting to think it’s literally a wiring issue but I will deal with that down the road when it comes

[@rsmith317]

I currently have this U0101 code on my 2014 Chevy Malibu. When the TCM is down, the car is stuck in third gear (limp mode) and gear shift is not illuminated. When I drive 20-30 minutes in limp mode , the TCM does come back and stays as long as I keep driving. When I shut the engine off and wait about 10 minutes and turn engine back on, the TCM fails again, so it's an intermittent issue. Chevy dealership has no answers after I paid them 224 dollars in diagnostic fees. They wanted an additional $1300 to further diagnose it and obviously I declined that, so now I'm stuck with a TCM that goes in and out. Very frustrating. I have taken that TCM connector off and on so many times that I've lost count. Nothing is working.

[@shamilbabayev8856]

Hi. I have the same problem with my Cruze2014. Could you fix the problem?

[@figgiefigueroa7372]

Buy one at the junkyard

[@DJJamOfThaDose]

Check for bad fuse box, had 2 I found on two different years 2012 & 2010. Found break in the circuit board under the fuses, there is a lot of videos on it.

[@zlatonicbuzz]

2014 Chevy Malibu this code pops up but it also says service power steering and my locks in my car go nuts like a mini gun going off, I can reset the tcm and it’ll run fine after but 2 weeks go bye and it’s back to fucking up

[@dcrookster]

We have a 2014 Malibu too and doing exactly the same thing.. What happened with yours? Thank you

[@donaldctwittyjr]

Where is the TCM located on a 2018 suburban lt?

[@constantinmilitaru]

Replaced the TCM and it’s a no start no crank. The new TCM is bad… 13 pins connection oil coming out… god… also don’t forget to disconnect the battery…

[@aaronj08ar]

Oil coming out of there is fine. All those wires terminate in the oil bath, they're not shorting out at the connector because of the oil.

[@supermomxt]

You have to have it programmed with your vin number at a dealership or a shop that can if you put a new one in.

[@MechaniclifeJDM]

@@aaronj08arVERY BAD ADVICE

[@moenycn6c]

I have the same issue I changed a new tcm and the car no crank no start

[@SaulPaez-ed7go]

I change the tcm but i have c0100 and p0722 codes do i need to reprogram? Because with mi old tcm i don't have that codes

[@GodessIsabelRaina]

I got a new battery. could it be that they put it in incorrectly❓️🤔 I had codes read on my vehicle and that one popped up. The only lights that I've been dealing with is engine power is reduced. I had my throttle body cleaned by Chevrolet and it's running even crappier so I've decided to figure out these codes for myself🙄

[@rscrevolutionpking7143]

Nah pretty much no way to put a battery on incorrectly, negative to negative, positive to positive, pre sure if you put the negative to positve and same with postive to negative all your wires just fry and youll definitely know if it does, theyll melt or something, dunno never been dumb enough to do it, just seen videos 😂 but check your spark plugs and coils, see hkw they look, if theyre crusty, bunch of oil gotten to them then could need new spark plugs and/or coils, had a car that went into limp mode due to that, changed them and ran normal, also check for any air leaking from the intake hose on the throttlebody, maybe leaking and not getting enough air if its runnibg worse since theyve cleaned it, id tell ya to check the throttlebody but unsure how mechanically minded you are and got to be careful with that as they go directly to your engine and the butterfly flap inside it can sometimes snap off into it if youre not careful

[@rscrevolutionpking7143]

Is it idling up and down alot? Not staying consistant in revs? Like goto 500, end up stalling or jump to 2000, then 1000, then 1500 etc etc

[@felipeisacchar2957]

Great información tanks

[@MikesVlogss]

Try using a OBD2 scanner to see if there are any stored codes from the day that you replaced the battery?

[@felixpolkey8449]

Can you tell me where the tcm is located in a 2014 Toyota Camry SE ,4cyl

[@MikesVlogss]

In a 2014 Toyota Camry SE with a 4-cylinder engine, the Transmission Control Module (TCM) is typically located inside the vehicle, often near the transmission or behind the dashboard. Specifically, it can be found under the center console or under the driver's side dashboard. For the most accurate location, it's a good idea to consult the vehicle's service manual or a repair guide. If you're considering replacing or troubleshooting the TCM, make sure to follow proper safety procedures.

[@mariachiwaula7140]

My VW Polo has U0101 and U111100, no gear display, shifter won't move out of park. Where can I check

[@lovisharora7250]

Take it to the mechanic

[@beckhamsfamilyjourney]

2013 chevy silverado 3500hd. How do you rest the TCM? I did the " remove the battery connection for hr" and nothing. It's not dirty or oily? All fuse are good. The dealership said I had to drive it in for them to look at it lol SHE DOESN'T MOVE FOOL! (The guy hug up on me). So is there a do it yourself? I know getting a new one it has to be programmed to the truck, so I still have to take it somewhere 😅

[@beckhamsfamilyjourney]

Also it has a sweet but nasty smell to it

[@mikey13b]

did u end up getting this fixed?

[@mikey13b]

@@beckhamsfamilyjourney if so where was the issue?

[@beckhamsfamilyjourney]

@@mikey13b the Circuit board fried

[@jimmybetters9869]

2004 Saturn will crank but the rpm keep moving while I’m in park what do that mean

[@28samz]

What about U0122 Lost Communication With Vehicle Dynamics Control Module (Corvette)

[@EARTHKEENING]

My scanner show no communication at all , I put it on another car and worked good , what possibly cause that I have crank no start .

[@HVAC_Mechanic]

Check for any blown fuses related to the fuel pump, sensors, or ignition. Basically, the first things to check are if the engine is getting gas and spark.

[@EARTHKEENING]

@@HVAC_Mechanic I'm getting fuel and spark and throttle working fine , fuses are good but I didn't check releys

[@Jeepche]

Hi, can anyone please help. I've got W212 2013, U010 code pops up every now and then with check engine light. The code goes away on its own. From past 2-3 days the code is popping more frequently. Whenever the codes pop up the car Doesn't shift up, rear camera doesn't work, when pushing the lever to shift gear from park to drive takes a strong jerk and the car only drives on 1st gear. The cars Ignition is fine amidst these AC sometimes stops working. Battery is new car start normally without any hesitation. Any suggestions on what to be done??

[@weerebuildz4427]

Hey need some help I am rebuilding a 2018 Audi S5 for my channel and i am getting the same fault codes but still can not find the reason to get the car to start and need your help.

[@cj599]

2014 sonic im getting a u0101 its a 5 speed manual ???

[@MikesVlogss]

Check the Wiring and Connectors: Inspect the wiring harness and connectors for damage, corrosion, or loose connections. Pay special attention to the connections between the ECM and TCM. Scan for Additional Codes: Use an OBD-II scanner to check for any other codes that may provide more context for the issue. Inspect the TCM: Ensure that the transmission control module is functioning properly. If you have access to another vehicle of the same model, you could swap TCMs to see if the problem persists. Check for Power and Ground: Verify that the TCM is receiving power and ground as needed. Use a multimeter to check voltage levels. Look for Software Updates: Sometimes, manufacturers release software updates for the ECM or TCM that can resolve communication issues. Reset the Codes: Clear the codes using the scanner and see if they return after a short drive. This can sometimes reset communication issues.

[@cj599]

@ i did it turned out to be a junk ecu from a crap companies

[@sirthomas5220]

Dealing with this issue on a 2016 impala…. It comes and goes…. Had the wires replaced and it worked for 8 months…. Problem is back and I’m trying to avoid a 3k fix

[@williammerrow]

I've seen a fuse block have bad connection. Check from the back side connections to the top side connections.

[@Habbasio]

HI SIR I HAVE 2012 CHEAVY EXPRESS VAN 3500. TCM FUSE WAS KEEP BLOWING I HAD CHANGE T C M IN SIDE CHANGED CONDUTOR PLATE.NOW CAN PROGRAMM KEEP COME UP U0101. I CHANGED E CM CHECKED WIREING ALL THAT.ONE GETTING 60 OHM.DLC TCM AND ABS. ENGINE 6.0. 6 SPPED T C M( ZF) I GOT DIAGRAMM. OBD. I CAN NOT FIND ANY PROBLEM 2 MONTHS.PLS HELP GIVE SOME HINT. WHRER TO LOOK. .ON LINE GUYS CAN NOT GM TECH CAME TRY TO PROGRAMME.CAN DO ANY THINK. MAY SEND YOU VIN? I AM SHOP HITECH GERMAN AUTO. NEVER DID GM BEFORE.

[@Renegar87]

Great video

[@Flugel1400]

Battery died one day and after getting it replaced it’s doing this. Can i narrow it down with that?

[@henm4975]

maybe it wasnt the battery then

[@Habbasio]

HI SI I CHECK ALL WIRING ONLY PROBLEM I SEE 103 GROUND GOSE TCM AND B C M. GROUND WHITE &BLACK.WIRE ..TRUNED TO 00.0 ON POWER PROB..GROUND GOWAY WHEN TURN IGNITION ON PLS HELP OUT WHAT SHOULD I DO I CHECK NET WORK GOOD.60&120.HOM MAY RUN GROUND BY BATTERY TO TCM? AND SEE IF WORK OUT.. O PLSFORGIVE MY ENGLISH VERY POOR I M GERMAN

[@SaeedAfrooz7]

Hi My car have problem with tcm When I start my car it’s ok for 1 hour and after that the gear only shows (p-n) not go to the (D-R) when I turn of my car and turn on its ok for one time change gear after that same issues Will appear

[@DW-ji6is]

Did you ever get this fixed? If so what was the issue! I have a 2014 Chevy equinox and it sounds like the same issue

[@Bradtomacelli36]

out of nowhere my car wont engage in 3rd or D unless im going 22mph i have to now start out in 1st or 2nd take it to 20 some mph then D and or 3rd will engage transmission was shifting perfect moments before and now getting u0101 and u0100 codes i believe like what the heck is up with thses impalas

[@49dsa505]

Thank you for the info!

[@AdrianAdy-ft2wn]

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[@MrTane41]

My 2010 Chevy Tahoe is not reading any codes whatsoever, but it doesn’t want to go and drive reverse or do anything let alone As a better off that I just take it to a shop

[@juanojeda8069]

Mi car was the battery do not hold the charge because winter and storage car. Mercedes GLA 250

[@treytonmiller8407]

My 2022 dodge charger lights won't illuminate on the shifter, won't start and has the service transmission code

[@lovisharora7250]

should be under warranty, take it to the dealer

[@philswift791]

A cheap signal generator is an amazing tool to use.

[@PatSpraker]

654 Sabryna Plain

[@GuadalupeMartinez-sl2ee]

I have this code on my 08 jeep grand Cherokee nobody can figure it out

[@AllanButchar-i4m]

Perez John Gonzalez Kenneth Anderson Gary

[@LatifKassim-sv2uk]

Hello

[@EdAguirre-zf6lg]

Ok

[@DavonConways-q6s]

Williams David Thompson Jeffrey Jackson Joseph

[@KayeBarnett-b4y]

Jackson Anthony Martin Jeffrey Johnson Linda

[@НуртилеуКойчибаев]

Негылдеді мынау

[@freddyg9026]

why do you talk so slow?

[@curyman000]

Why do you talk fast?

[@deadly1360]

He doesn't, stop doing bumps and the world might slow down buddy. 👃❄️

[@CodyPing]

also the charging system for this car has wild fluctuations from 12.2v - 14.7v your alternator is not the problem this is normal

[@SaeedAfrooz7]

Hi My car have problem with tcm When I start my car it’s ok for 1 hour and after that the gear only shows (p-n) not go to the (D-R) when I turn of my car and turn on its ok for one time change gear after that same issues Will appear

[@HVAC_Mechanic]

It needs to be troubleshooted to know the cause, but often, when there is no issue when starting, but after the engine gets hot, there is an issue. The TCM has a bad contact or solder joint on the board. This is just a guess, but I have seen it before.

[@SaeedAfrooz7]

I changed the tcm fuse , but the problem is still there , what may cause ? There is no issues code to know what’s wrong with the car no check light ! After one horse ride the problem coms and gets worse , Every think ok the gearbox is so soft , but when gets hot when I want to change the gear it’s only go to (n-p) when I turn of it ok only for one more time