2011 Mazda 3 2.5L TCM Diagnosis and Fix

In this video you will be watching of how to diagnose and fix a Lost communication with TCM code for 2011 Mazda 3 2.5L engine..Symptoms of this issue is that your car will stall when car or engine is hot also it has an engine light on AT and Skid symbol sign on the dashboard ..

[@amazingsylvia]

Thank you for sharing, just got that code on my mazda3. I’m a woman and I understood perfectly what you explained and i can show my mechanic the option.

[@asianmechanicguy6483]

Glad it helped

[@jorgeposadas3885]

This was great video. Thankyou so much for making it and walk through. This was really informative

[@asianmechanicguy6483]

Glad it was helpful!

[@FelixemmaHighway]

Thanks sir and now i have idea what is the problem of my car, keep it up and godbless

[@asianmechanicguy6483]

Happy to help

[@FelixemmaHighway]

@@asianmechanicguy6483 thanks sir

[@vanquishstorm3806]

Thank you for the insightful vid. I have a 2010 Mazda 3 that is experiencing hard gear changes especially in reverse. It also has a parasitic draw draining the battery if left over night with the battery cables connected. If the TCM is indeed the culprit for my transmission issues, can a faulty TCM also be presenting the parasitic draw issue as-well? Based on my research, one of three speed sensors can also create issues with the transmissions function such as the Input shaft sensor, output shaft sensor and vehicle speed sensor. Out of these three sensors, is one of them more prone to giving the transmission shifting issues? The instrument cluster illuminates on with the headlights on but both RPM and Speedometer gauge needles are not functioning at all. Any feedback would be greatly appreciated as I’m trying to get the vehicle back on the rode. My TCM looks similar to yours but I also want to verify that it is indeed the issue and not any of the speed sensors. Thank you for your time. New sub.

[@laurenzomcnab3884]

Good day I have a Mazda 3 2005 module and a Mazd Exella 2016 Module ,but my tcm is not located under the battery box.Any ideas where it can be please

[@1clkvideos140]

Thanks AMG! I’m dealing with a similar issue with my daughters Mazda 3. My plan was to replace the transmission input / output speed sensors (which I will still do) but, for sure I will disconnect the TCM and use electronic cleaning spray as well as to relocate the module away from the heat source based on your experience here. At a minimum - it can’t hurt, but that might be my actual problem too.

[@asianmechanicguy6483]

we end up replacing the tcm for this car i just deleted the update video by accident actually i had a brake replacement for this car last month and car is running good

[@1clkvideos140]

Just curious, had the TCM failed again after you removed it and relocated it? Or was it replaced based on the original diagnosis? Just wondering if it had begun to malfunction again prior to the replacement?

[@asianmechanicguy6483]

@@1clkvideos140 My initial decision is to replace the TCM but the customer declined due to money issue then It failed again after few days after i relocated it so we decided to replace the TCM ..and car is running good as of this moment

[@1clkvideos140]

Thank you for your responses!

[@chrishristov4482]

TCM is probably good. Most likely there is a loose connection with the CAM bus communication wires at the tcm female connector@@asianmechanicguy6483

[@Fearless-1]

Perhaps inserting a thick piece of heat-resistant material between the TCM and transmission body would alleviate the TCM thermal damage.

[@Aldo1823xX]

I have a 2011 Mazda 6 but the code I get is P0883 is it the same thing?

[@Nelson-ig9fz]

Thanks kabayan for the informative video. My daughter's car had the same lights come on. My mechanic said he couldn't fix it and asked me to bring it to Scarboro Mazda and Mazda suggested that it will be too costly to fix. Seeing how much work you did just to get to the TCM, I understand why Mazda thinks it was not worth salvaging. I now wonder if I just junk the car. Mazda told me that even after changing the TCM, other parts may also be damaged. Considering how expensive cars are these days even for second hand cars, I really want to salvage this car so my son can use it. Wonder if you have any suggestions.

[@asianmechanicguy6483]

theres no other option than to buy a new tcm

[@tomtomgarage9760]

Good job bro

[@asianmechanicguy6483]

Thank you so much 😀

[@user-tl8hn6cs9l]

My car AT light on can I keep driving

[@tobilobaowoyele7213]

I have the AT light on on my 2010 Mazda 3 (214,000km) It has been on since 180,000km. The only issue is that I cannot drive the car in manual mode but it shifts perfectly in automatic. I have just chosen to ignore it.

[@tobilobaowoyele7213]

Now I am back at 235,000kms, currently searching for rebuilt TCM to purchase. It drives perfectly in manual mode but doesn't shift to 4th gear when the transmission gets hot. 😂

[@sergiodiaz5813]

I have the same issue whit a 2011 Mazda cx-7 motor 2.5 ,where it's the TMC located?

[@asianmechanicguy6483]

google it bro

[@StarFrog]

Can you tell me which tools you used for the job?

[@asianmechanicguy6483]

mostly 10mm 12mm socket

[@stephenhkwan]

It's interesting that this started happening one day as I was turning at a traffic light. AT came on and I wasn't able to shift anything. The same night after not driving it overnight, the AT light was no longer there. The Check Engine light is on (and still is) but it had been there for a while even after my mechanic looked into it. This summer after changing the battery of the car, the Check Engine light went off. The AT light comes on at times and sometimes doesn't. I could even drive it on the highway for 10km and when it comes off, I'll just park to the side, turn off the car, leave it for 10 seconds and ignite again and the AT light is no longer there. Just wondering if this is common for my TCM to be replaced or it could possibly be a connection?

[@asianmechanicguy6483]

Get it diagnose by a mechanic

[@EduardoHernandez-eq6kq]

I have the exact problem

[@DesertTOON]

I have a similar problem. I drive the car all is fine, then stop go go shopping. Start the car again driver couple miles, then can't shift into 5th gear. Go home park the car. Drive it the next day everything is fine until I park the car

[@HuskerRed11]

​@@DesertTOON Did you get it figured out?

[@DesertTOON]

@@HuskerRed11 I took my car into the shop and got the solenoid control replaced. But, was still having some issues with the transmission. The guy at the shop said it was probably the TCM, but I would have my car in the shop for week while waiting for the TCM to get refurbished. So, I didn't want to wait a week and pay the $1100 dollar repair so I just forget about it and didn't take it any further.

[@sebastianduque2665]

Hi, I’m having an issue with my 2012 mazda 5, code P0766 (shift solenoide D) do you think the TCM can cause this issue or just a solenoid failure? Thanks

[@asianmechanicguy6483]

it can be the tcm or solenoid honestly its hard to tell and its hard to diagnose it cuz its expensive to open a transmission and mostly customer decline to do it so we end up replacing tcm and solenoid

[@sebastianduque2665]

Thank you

[@Remmy1314]

Hi Bro，my car have the same code. After reset the code. It does not come up again. However, the AT is now shifting by itself. Even I use M mode, it can shift from 4 to 5 by itself. Any idea? Many thx in advance.

[@asianmechanicguy6483]

buy a new tcm it will fix ur problem

[@dotted_rarity5]

I just got this, should I be worried about driving with this to the mechanic? Is it better to tow the car?

[@asianmechanicguy6483]

tow it to ur mechanic to about inconvenience if the car act up along the way

[@_TheJourney]

I have an automatic 2010 mazda 3 which started jerking when shifting through the gears. i changed the ATF and it still continued and later on the car lost power while i was driving and it wouldnt engage any gear. The mechanic says i need to change my gear box and tcm. While all this was happening i never had any warning lights come on. Any thoughts or comments ?

[@asianmechanicguy6483]

Scan it for codes but most likely you got a bad tcm is very common to mazda 3

[@_TheJourney]

@@asianmechanicguy6483 will let you know how it goes

[@_TheJourney]

And thank you for the response

[@jonathancisneros2275]

I had AT light and more symptoms but turns out it was the pcm/ecm the pcm shorted out the tcm so i had to change both currently waiting for pcm to be be change

[@asianmechanicguy6483]

wow thats suck ecm and tcm not sure about that how the ecm shorted the tcm please update me brother what will be the result after u install the ecm and tcm thank u

[@jonathancisneros2275]

@@asianmechanicguy6483 sure will update you like they change my tcm but u still had bad symptoms of bad ecm and they change the tcm like 3 times and still nothing untill the specialist came in and said I needed i had a bad pcm and that I needed a new pcm and that the THE TCM SHORTED OUT THE PCM OUT THE PCM

[@CarlosMorales-nv1qm]

So just cleaned up the connector and it worked?

[@asianmechanicguy6483]

it works for a while but when the TCM gets hot it malfunction again recommend the customer to buy TCM

[@BonBon-so4we]

Did the customer reported any problems days, weeks, or months after that?

[@asianmechanicguy6483]

yup after few days problem came back so customer bought a tcm from dealership i think i did replace brake pad for this car after couple of months and i did show or explain there that they replace the tcm for this car and car running until now

[@adonisgotbeatsmusicp]

I have the same problem but can't find the part no where. Where did you purchased? Number? Website? Address?

[@asianmechanicguy6483]

Dealership my freind

[@auspaso]

Hi , I have replaced my tcm , the car is now driving and shifting normal , but I still have all the lights on the dash ? Any advice , thank you

[@deadlymoonlight]

How did you get the engine light off?

[@deadlymoonlight]

Do you still have it on? How did you get it off?

[@jaychills8709]

My AT light went on my 2011 Mazda 3 at the beginning of December, went to the dealership and they said it was my TCM. I found the only one in the state at another dealership and took it back to the dealership where my car was at to be replaced. Then after a week and 1423 miles later the light was back on. Then they said I needed to do the trans fluid exchange to see, I did that for another few hundred dollars, then the light was back on within 2 days. Then they said we tried those things, it’s your transmission. I have an automatic transmission, 20 thousand miles later I’m still driving it without any problems thankfully, the light is still on. I just don’t know why they couldn’t tell me it was my transmission from the beginning. Also, wondering if it could have been a bad TCM even though it was brand new. I have 305,000 miles on the car. Mostly highway miles.

[@asianmechanicguy6483]

the problem with transmission is that u cannot exactly 100% determine the broken parts until u tear down ur transmission and its too pricey to do that ..So most shop they go on alternatives like checking ur TCM first or ur fluid cuz those parts are easier and faster to diagnose

[@jaychills8709]

@@asianmechanicguy6483 that makes sense. Thanks so much for the response! After a rebuilt transmission on a car that already has 305,000 miles, is it likely something else might happen? Or how many miles have you seen a 2011 Mazda get to?

[@asianmechanicguy6483]

@@jaychills8709 well we cannot really tell when it will last.. the only thing we can do now is to do a transmission regularly ..i suggest yearly even some shop will dis agree with me

[@jaychills8709]

@@asianmechanicguy6483 thank you

[@Ben-Rogue]

Just so people know that you don't necessarily need to buy a new TCM. Depending on where you live, there are some companies that do an exchange or repair for these TCM's, as they have a very high failure rate. It can be as low as 1/5th the price of a new TCM... In my opinion, Mazda should have been made to do a recall for these, to replace and relocate them off of the transmission.

[@niravpatel4768]

I have a shift solenoid f code. What do you think about it? Can it be tcm? Thank you for the video.

[@asianmechanicguy6483]

Yes, absolutely

[@niravpatel4768]

@@asianmechanicguy6483 thank you for the reply brother.

[@deadlymoonlight]

My code is p06b8 how do I delete the engine light without a machine?? How can I program my remote keys to the car?

[@asianmechanicguy6483]

remove negative battery terminal for few minutes then put it back but it will not fix ur problem eventually it will show up again

[@deadlymoonlight]

@@asianmechanicguy6483i did that but didn’t work

[@CarlosMorales-nv1qm]

I had the same problem I relocated the TCM but the AT light came up again.

[@asianmechanicguy6483]

then ur TCM is bad buy from TCM from dealership

[@CarlosMorales-nv1qm]

Does it need any programming?

[@asianmechanicguy6483]

@@CarlosMorales-nv1qm if u buy it at the dealership they will reprogram ur vin number to the tcm but i had an experience before that a tcm from junkyard works when installed without reprogramming

[@amadolasala200]

Kabayan, yan din kaya ang problema kapag nililipat ko po ang gear from park-drive-reverse. May parang nag babang or may nalagutok kapag nag lilipat po ako ng gear. Salamat po!

[@asianmechanicguy6483]

same car ba kabayan

[@amadolasala200]

@@asianmechanicguy6483 2010 languages po sakin. Mazda 3s 2.5L

[@titandosecod]

P0884 is this the same issue?

[@asianmechanicguy6483]

maybe its a transmission code

[@titandosecod]

@@asianmechanicguy6483 pulled a tcm for $350 all good now

[@amandaperez8175]

How much is the Tcm

[@asianmechanicguy6483]

$700plus CAD

[@amandaperez8175]

Thank you, My Mazada sensor A T light comes on my car is still running great I'm hoping its something minor

[@nakorsha555]

@@amandaperez8175 hi Amanda… was wondering if you came across any other problems afterwards??

[@stephenhkwan]

@@asianmechanicguy6483 do you think it's worth buying a used TCM? These are so expensive and for a 2010 car with 265,000, is it really worth it to keep spending more money to work on this car? I've spent about $2000 over the past 3 years to fix certain things on this car and getting tired of Mazda

[@asianmechanicguy6483]

@@stephenhkwan honestly no especially ur car had so much miles on it..

[@MikeAnderson2858]

You can find it online much cheaper and faster.

[@asianmechanicguy6483]

flagship one

[@thecritic8318]

this guy doesn't mention how to relearn your tcm by shifting through gears slowly driving letting it come to complete stop without using brakes then again higher speeds soft acceleration then let come to complete stop. Also doesnt mention how to relaern throttle body which can cause jerky stalling when driving

[@asianmechanicguy6483]

i had one video this year for this car i think that was a brake replacement video and i did show there that the owner ended up in replacing the tcm and the car still working up to now so what relearn u talking about my friend ..car is already fix and that is TCM replacement

[@thecritic8318]

@@asianmechanicguy6483 supposed to shift thru the gears drive it slow acceleration let it come to a stop without using brakes then do the same thing higher speeds letting it decelerate without using brakes look it up

[@asianmechanicguy6483]

@@thecritic8318 car has a trouble code it was in a limp mode im no expert it this but i had few mazda 3 videos that it has a tcm issue which is common issue with mazda 3 ..i recommend the tcm to be replace the owner bought a new one from dealership and other shop install it and it was working till now so what more should u do car is already fix ..TCM replacement

[@thecritic8318]

@@asianmechanicguy6483 for the third time you have to do a tcm relearn procedure I explained above google it you fixed it half way