AT Warning Light Illuminates

[srbin]

As I was driving towards Sq1 today AT Warning Light illuminated... I immediately started checking the gear shifting in order to check if it's maybe problem with TSS but everything seemed to be fine... Would a simple transmission flush fix this or could it be something else?

Anyone experienced this problem yet? I searched the forum but couldn't find anything...

[TheMAN]

I think you need to take it to the dealer to find out what codes they are
its definitely electronic related and not fluid related

[srbin]

I'm gonna go to my dealer tomorrow but I just wanted to see if anyone else had this problem...
hopefully i won't have to sell my kidney to fix this problem... :chuckle

[mzkaye729]

My 05 Mazda3 had this light on as well but it turned out to be a minor problem: the turbine speed sensor was malfunctioning so I had it replaced at Agincourt Mazda.

[sauga_kid]

Mine did the same, then proceeded to skip the 2nd gear. Took it in and they ended up having to change out the transmission...hope this isn't the case for you.

[srbin]

So i went to my dealer today and i got some bad news... my baby's sick... :(
they pulled out a code (which i can't remember now) which suggests that there's 'something' build up inside my tranny which can only be fixed by buying a new tranny since they don't take them apart to inspect...BUT the mechanic said to me that he test drove my car and everything seems to be working fine i.e. no skipping gears no shakes no stalling (no TSS issues)... so he was puzzled... basically what he did was reset the system and suggested AT flush which i will do somewhere else tomorrow because i have no intention of paying them $190 for such service...
In the end i was told if the light comes on again i can do the following:
-continue driving with the AT light on until it actually breaks down
-buy a new tranny
:bang

now i gotta buy something to me her feel better... :super smiley

[srbin]

*make

[TheMAN]

no one can help you here if you don't remember the code

[srbin]

So it happened again today only this time CEL illuminated as well...
I was going around 80km/h on Derry in 5th gear when all of a sudden tranny shifts to 3rd gear, the car starts shaking and AT and CEL lights illuminated... i was like wtf?... pulled over to the side and as soon as the car came to a complete stop (1st gear) AT light disappeared but CEL stayed on... what's weird about this whole problem is that when I'm going 50-60km/h car runs flawlessly until i hit 80km/h min... that's when tranny goes nuts downshifting gears...:flaming i dropped the car off at Westowne Mazda and they'll take a look at it tomorrow morning...
to top it all off rental that i got is Suzuki swift.... :bang

[JovianGhost]

I would suggest next time your CEL or other warning light comes on, ask around the forums and I'm sure you can find someone in your area that has an ODB reader. At the very least you can figure out what the code is before taking it into the shop.

[JovianGhost]

BTW, sucks about your car... :(

[sauga_kid]

I figured it was the tranny, what you had described sounded just like what had happened right before mine went. Hope everything works out. Sorry about getting the Swift, I got a CX-7 as a loaner.

[srbin]

I would suggest next time your CEL or other warning light comes on, ask around the forums and I'm sure you can find someone in your area that has an ODB reader. At the very least you can figure out what the code is before taking it into the shop.

I'm definitely buying one over the weekend... now that i'm at 150K i figure i need one...



I figured it was the tranny, what you had described sounded just like what had happened right before mine went. Hope everything works out. Sorry about getting the Swift, I got a CX-7 as a loaner.

it's weird because now they are getting the code for TSS... which kinda makes me feel better...so i'm probably gonna have that replaced and hope for the best... i figured it's worth trying considering that the new tranny is ~$2700 +labor+tax :bang

I :complain about my rental today but that's all they had so i'm stuck with it... :bang

[sauga_kid]

it's weird because now they are getting the code for TSS... which kinda makes me feel better...so i'm probably gonna have that replaced and hope for the best... i figured it's worth trying considering that the new tranny is ~$2700 +labor+tax :bang

I :complain about my rental today but that's all they had so i'm stuck with it... :bang

Ah, I see, you're at 150K. I was within the 100K warranty so mine was covered. Sorry to hear once again.

[srbin]

TSS got replaced and the cars runs perfectly... :winner
the only thing now is that the bulb underneath the stick that lights up P R N D is out...:whoa

anyone knows what kinda bulb is that?

[mazda lover]

TSS got replaced and the cars runs perfectly... :winner
the only thing now is that the bulb underneath the stick that lights up P R N D is out...:whoa

anyone know what kinda bulb it is?
\

what is a TSS

[Dave_The_BMXER]

Transmisson speed sensor?

[mazda lover]

Transmisson speed sensor?

Thanks...someone suggested "turbine speed sensor"

[srbin]

Thanks...someone suggested "turbine speed sensor"

Yeah... TSS is a Turbine Speed Sensor and the code for it was P0715...

[Bluemazda3-S]

I got the same code today, cleared it, and we'll see what happens. Anyone change the TSS themself? Hard job?

[RedRaptor]

Just curious, have you any guys having issues with your tranny, ever changed out (drain & fill or flush) your AT fluid before?

[McGuyver_3]

TSS got replaced and the cars runs perfectly... :winner
the only thing now is that the bulb underneath the stick that lights up P R N D is out...:whoa

anyone knows what kinda bulb is that?

check here (http://www.mazda3forums.com/index.php?topic=26798.60)
its about the 17th or 18th post down

[mzkaye729]

Just curious, have you any guys having issues with your tranny, ever changed out (drain & fill or flush) your AT fluid before?

I did. I bought the car at around 132xxx kms (I can't quite remember) and it gave me the TSS problem at around 137xxx kms. I had the "in-house mechanics" at the used car lot flush the AT fluid for me when I picked the car up too.

[RedRaptor]

I did. I bought the car at around 132xxx kms (I can't quite remember) and it gave me the TSS problem at around 137xxx kms. I had the "in-house mechanics" at the used car lot flush the AT fluid for me when I picked the car up too.

I guess its not related to having the ATF changed. Owning an 04, I am on the look out for this issue.

[last_shot]

I just recently started having the same problem. I've got an 05 GT sport and my AT light comes on every now and then. I don't notice any jerking with the gears but when I shift over to the tiptronic, it won't work and there's no indication of what gear I'm at on the instrument cluster. My CEL has been coming on and off as well. Should I be worried??

[TheMAN]

your issue is most likely different and was talked about also... if you search for one of my posts, I posted a solution to it

[last_shot]

your issue is most likely different and was talked about also... if you search for one of my posts, I posted a solution to it

I went through all your posts but I wasn't able to find anything.

This morning when I drove the car, the CEL light was on but the AT light never came on. I checked my engine and tranny fluid and they're both find. My car's got a little over 102,000km on it and the tranny fluid was replaced less than 15,000km ago.

[Bluemazda3-S]

I'm going to try and diagnose the problem tomorrow at the shop with the mechanic. He says although it's probably the sensor, it could also be the wiring, or even internal failure. If a bearing is going there could be too much play, therefore causing faulty readings from the TSS. So we're going to put the scope on it and see what the SIN wave looks like, if its steady with no spikes or plateaus, then its most likely the sensor. I'll let you guys know.

[SandraDee]

I've just read this thread...I need help.

Off and on over the past few months my AT light has gone on with the CEL...randomly (usually the AT goes off and the CEL hangs around a bit until it too goes off). I noticed my tachometer acting funny when the light has gone on...It doesn't move steady and smoothly as it usually does. This last time, it didn't go back to "steady and smooth" once the lights went away. I've also may have noticed more jerking of the car when i shift gears. So i checked the Codes at my mech's place. It was P0715. I have just replaced both the speed and turbine sensors...but the tachometer still is jumpy:loco. Any help here? I can drive it for a while and see if the AT/CEL pops up again and check the code...but i'm worried about messing up my tranny.

Note my car is an '04 with 130k on it.

Thanks!! :)

[Bluemazda3-S]

Your problem sounds different than ours was. Did yours shift down to third and stay there until coming to a complete stop? Judging by your write up, it sounds like a bad wire somewhere, or a corroded plug. The TSS has nothing to do with your tach, although they do rely on eachother for calculating shift points. Where the computer gets the signal for the tach I have no idea. It could be cam sensors, crank sensor... Not sure. But if one of those sensors was acting up, then there would be a code for those. I suggest getting the car scoped out. On our car the signal just dropped then came back. I would suggest letting the mechanic at our shop scope it cause he knows his shite, but I don't want to seem like I'm advertising or shop. So PM me if interested

[Corn]

Hi,

Please don't laugh on me, everybody is talking about AT light, what does it mean AT though?
Thanks.

[Bluemazda3-S]

Hi,

Please don't laugh on me, everybody is talking about AT light, what does it mean AT though?
Thanks.

Automatic Transmission, at least thats what I always assumed

[nathan]

I have a 2010 Mazda 3, just got it 14 days ago "as is". I thought it was a really good deal at first but now I have this AT warning light that comes on whenever it wants; when it does come on and I have my foot on the gas it feels like it grabs hard and jerks. I let off the gas, "mostly out of shock"from the jolt.just had the ATF changed and doesn't seem to have a bad tranny. I had it parked sitting in my driveway and the AT light came on and off but didn't budge at all ? Can't figure this out. Anyone have a idea ?

[nathan]

If it was the transmission going would it throw the AT light on when I wasn't moving?

[nathan]

According to the manual AT stands for Automatic Transaxle, which in English terms means Automatic Transmission

[McGuyver_3]

How are you so sure you don't have a bad transmission just because you had the fluid changed?
Did you have the same symptoms before the fluid change? If not then obviously something went wrong after the change. And I would recommend checking the fluid level as incorrect level can cause all kinds of issues. But for all we know it could have bad clutches or gear monitoring faults. When your light comes on something is obviously wrong. Going to need to find someone with a scanner that can pull trans codes

[Jackal]

When your light comes on something is obviously wrong. Going to need to find someone with a scanner that can pull trans codes
+1 when the light comes on something is wrong or is about to go and is periodically causing the light. Pull the codes.

[Mazda3Mom]

I need help. My sons 2007 Mazda3 GT is having same troubles with the AT light. First instance we got it checked right away at a transmission place in Etobicoke. Code from warning lights was a P0758, shift solenoid B. So this solenoid was replaced and pan cleaned and new oil put in. I was told a lot of dirt was in the pan but all cleaned out. Job was $800. Next morning it happened again. Back to tranny guy who cleaned pan again and put more oil in for another $50. Next morning all came back on, CEL and AT lights. Talked to a Mazda dealer in my neighbourhood in March ssissauga and they would check the codes and probably install a new TCM for over $1G. They don’t even sound confident would fix and suggested we buy new of course or replace tranny. Car has almost 235K so not sure what to do cause kinda scared to put a lot of money into a 2007 car but was hoping to still have this going for another few years. Any advice?

[Booter22]

I need help. My sons 2007 Mazda3 GT is having same troubles with the AT light. First instance we got it checked right away at a transmission place in Etobicoke. Code from warning lights was a P0758, shift solenoid B. So this solenoid was replaced and pan cleaned and new oil put in. I was told a lot of dirt was in the pan but all cleaned out. Job was $800. Next morning it happened again. Back to tranny guy who cleaned pan again and put more oil in for another $50. Next morning all came back on, CEL and AT lights. Talked to a Mazda dealer in my neighbourhood in March ssissauga and they would check the codes and probably install a new TCM for over $1G. They don’t even sound confident would fix and suggested we buy new of course or replace tranny. Car has almost 235K so not sure what to do cause kinda scared to put a lot of money into a 2007 car but was hoping to still have this going for another few years. Any advice?

if it comes back might need a tranny.i used to work for mazda for 5 years and those older ones can get expensive when the at light comes on. and we replaced that cars transmission with a used one, last may, then the valve body, and tcm. now the light has come back on and were doing the transmission again. ive already told him to sell the car. i know its hard to part with but it can get very expensive. if it were me. id cut the loss now and sell it. try and find something else.

[licquyd]

As I was driving towards Sq1 today AT Warning Light illuminated... I immediately started checking the gear shifting in order to check if it's maybe problem with TSS but everything seemed to be fine... Would a simple transmission flush fix this or could it be something else?

Anyone experienced this problem yet? I searched the forum but couldn't find anything...

I started off with just the AT light coming on (Automatric Transaxle), and even it got work and it would drop from 5 to 3, and then sometimes would not go show the gears in the dashboard.

It got worst with the warmer weather

Today, I replaced the Transmission Control Module and now it is working perfectly fine!

The TCM is a common issue and is the same for 2007, 2008 and 2009

Read my post: http://www.torontomazda3.ca/forum/showthread.php?84592-Mazda-3-2008-AT-light-with-code-PO841-with-transmission-issues

[licquyd]

I need help. My sons 2007 Mazda3 GT is having same troubles with the AT light. First instance we got it checked right away at a transmission place in Etobicoke. Code from warning lights was a P0758, shift solenoid B. So this solenoid was replaced and pan cleaned and new oil put in. I was told a lot of dirt was in the pan but all cleaned out. Job was $800. Next morning it happened again. Back to tranny guy who cleaned pan again and put more oil in for another $50. Next morning all came back on, CEL and AT lights. Talked to a Mazda dealer in my neighbourhood in March ssissauga and they would check the codes and probably install a new TCM for over $1G. They don’t even sound confident would fix and suggested we buy new of course or replace tranny. Car has almost 235K so not sure what to do cause kinda scared to put a lot of money into a 2007 car but was hoping to still have this going for another few years. Any advice?

Check out my post today http://www.torontomazda3.ca/forum/showthread.php?84592-Mazda-3-2008-AT-light-with-code-PO841-with-transmission-issues

I am pretty sure it is the TCM and you can get one rebuild for $250 to $300 dollars.

Fixed my issue right away. and was easy to install.