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Discussion Starter #1
Hey all,

I just bought a 2016 I Touring Hatchback a couple weeks back with 28k.

I noticed something in the cooler mornings here in Minnesota (50-60 degrees). Once I start it up and start driving, the car goes from 1st to 3rd gear on very light acceleration almost skipping 2nd gear immediately with low revs. I noticed when the engine is cold, the transmission shifts from 1st to 2nd but there can be a pause which it seems the revs can hang up at around 2k and then it shifts. I almost would say it revs up slightly (200 rpms) before it shifts. Now if it was slipping, it would be more prone to have this happen when warm rather than cold. Also this doesn't happen all the time but only with a cooler morning. If the sun is shinning and its warmer out, it never happens.

Is this normal behavior? Is the car trying to maximize fuel efficiency or protect the transmission?
 

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I really can't say it's normal or not, except to say I don't notice mine doing that on my '15.

However, I will say that I never know what gear my transmission is in because the shifts are so smooth. Most of the time I can't feel it shifting at all, the only hint of it shifting being the tachometer showing the RPMs change if I happen to be looking at it.

I doubt I would ever notice whether mine skipped second or any other gear because of this smoothness. I'm sure lighter vs heavier throttle positions have an effect on which gear it's in or how long it stays in any given gear, etc.
 

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Discussion Starter #4
I really can't say it's normal or not, except to say I don't notice mine doing that on my '15.

However, I will say that I never know what gear my transmission is in because the shifts are so smooth. Most of the time I can't feel it shifting at all, the only hint of it shifting being the tachometer showing the RPMs change if I happen to be looking at it.

I doubt I would ever notice whether mine skipped second or any other gear because of this smoothness. I'm sure lighter vs heavier throttle positions have an effect on which gear it's in or how long it stays in any given gear, etc.
Thank you for writting back. It's an extremely smooth transmission. I am super picky on how everything feels. Maybe I need to stop watching the tach and see if I notice it less. Normally I am light pedal when driving. My car is under warranty but not sure how that works. Even a small blip a dealership won't touch it.

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Discussion Starter #5
Bumping this thread again.

I noticed this is very consistent when cold. Once the cold light goes away, so does the problem.

Has anyone had Mazda update their pcm under warranty and if so, was it covered? Is this just a normal Mazda thing for when its cold that the transmission acts differently by changing the shift points compared to warm?
 

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Discussion Starter #6
Update: Its temp related. When really cold outside it doesn't hiccup right away. However, once running for a min or so it happens. Once the cold engine light goes off, it's back to being smooth.

My guess is a flaw in the transmission programming as it is consistent and predicatable. I asked Mazda if they would update pcm if there is an update for free.

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Mazda said they could look at it but if not deemed a powertrain incident, I will be charged for a diagnostic fee.

Knowing how mechanics work, they will say they cant duplicate the problem.

The work around I have done is lifting my foot off the gas just for a breif moment before it would shift hard. After doing this, its finw there after.

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I've got a 2015 2.0 AT Mazda 3 fwis... From what I've gathered its normal behavior... I've considered a drain fill since its got 80k miles (not a flush) but I'm not sure myself...
 

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Discussion Starter #10
I've got a 2015 2.0 AT Mazda 3 fwis... From what I've gathered its normal behavior... I've considered a drain fill since its got 80k miles (not a flush) but I'm not sure myself...
Thanks for replying. Since disconnecting and reconecting the battery, it has improved so much that either ita rare or no existent. My thought is that by it relearning from the factory base settings, it reset it from happening. This car is amazing overall.

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Mine does something similar..
2016 2.0 autotragic. @70,000km
Like you said, all good after the first km or 5-10 minutes of driving, only at slow speeds.
Gonna do a preemptive trans drain and fill at the next oil change.
 

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Discussion Starter #12
Mine does something similar..
2016 2.0 autotragic. @70,000km
Like you said, all good after the first km or 5-10 minutes of driving, only at slow speeds.
Gonna do a preemptive trans drain and fill at the next oil change.
Id be curious what happens after you change things out. Reset pcm at the same time to force it to relearn.

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Update: After disconnecting the battery this has solved 80% of this incident. It is colder outside so I'm curious if weather will play into a change coming this spring/summer. I have come to live with it as a "glitch" mazda has in the powertrain programming.

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Update: After disconnecting the battery this has solved 80% of this incident. It is colder outside so I'm curious if weather will play into a change coming this spring/summer. I have come to live with it as a "glitch" mazda has in the powertrain programming.

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Thanks for the updates!
I have a 2017 Mazda3, 2.0 AT. In my country the temperatures could reach also negative levels. I am experiencing the same behavior as you initially described. It's even more sluggish when it's really cold outside (close to negative temperature). Once the "Cold Engine" blue light goes off the transmission starts shifting smoothly again. How exactly did you reset the PCM? You just unplug the battery? For how long it needs to be unplugged for the PCM to reset?
Thanks!
 

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Discussion Starter #15
Thanks for the updates!
I have a 2017 Mazda3, 2.0 AT. In my country the temperatures could reach also negative levels. I am experiencing the same behavior as you initially described. It's even more sluggish when it's really cold outside (close to negative temperature). Once the "Cold Engine" blue light goes off the transmission starts shifting smoothly again. How exactly did you reset the PCM? You just unplug the battery? For how long it needs to be unplugged for the PCM to reset?
Thanks!
I'm located in Minnesota so I'm sure its close to your temperatures.

I unplugged and hit the brake pedal a couple times after to get rid of any stored memory. I left it unplugged for a half hour or so. Then I drove it like a grandma for 100 miles to help it relearn. Made a difference but we'll see how it reacts in warmer weather.

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I'm located in Minnesota so I'm sure its close to your temperatures.

I unplugged and hit the brake pedal a couple times after to get rid of any stored memory. I left it unplugged for a half hour or so. Then I drove it like a grandma for 100 miles to help it relearn. Made a difference but we'll see how it reacts in warmer weather.

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I will try to do that also. Is there anything that you needed to reconfigure after this process (auto windows memory, infotainment code or something)?. How many miles do you have at the moment? I'm at 37k Km. Thanks!
 

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It is pretty strange, most cars hold the gears down when cold - this keeps the engine speed up to warm up the exhaust cats quickly.
 
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