Skip the auto shop - Our mechanics make house calls

Q: Automatic transmission programming problem

asked by on

I'm having some issues with the automatic transmission in my car. While I'm driving at the speed of 30 mph, the car is showing that it is in fifth gear. Similarly, when I drive at only 45 mph, it shows sixth gear. Another weird thing is that when I'm accelerating fast, it would show downshifting gears. So, for instance, then it would shift from fifth gear to second gear. It is confusing how this transmission works and how it is possible to downshift in order to accelerate while going at the speed over 65 mph. I was told this a programming issue. What do you think? Is there any way to fix this or should I just drive this way?

A: While I agree that this is all probably bui...

While I agree that this is all probably built into the programming of the transmission computer, after looking at the Mazda service information, I see no TSB's that states Mazda has any updates available in transmission programming to address any of these concerns. However, there is a TSB that does correct torque limitations that will correct issues with steep hillclimbs. This would affect the downshift logic, maybe under heavy acceleration you might be triggering an over torque protection feature and that is why the the transmission downshifts from 5th to 2nd. But this is purely speculation. You could take it to the dealer and get the latest software calibrations installed along with a fault survey of the transmission control unit to be sure that you do not damage the transmission in case there is a problem with the current software installed. I would have the shifting and acceleration issue checked sooner than later to avoid any major damage from happening to the transmission.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: ABS light on dash board

Hello. Since this could be a variety of potential issues, I would recommend hooking the car up to an OBD scanner to download any trouble codes that may have registered as a result of the light coming on. I would...

Q: Car stalls out of nowhere

Hello - what a frustrating problem to solve! You may have provided a key clue to the solution, given that it requires another vehicle to jump start it to get it going again. This MAY mean that the increased starting...

Q: Clanking while pressing gas, making a turn and accelerating

The problem sounds like your transmission broke a forward over-running clutch inside the transmission. I would recommend having a mechanic inspect to determine if the noise is from the transmission or the engine, since both the engine or transmission can...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...