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: Several batteries died out

The most likely causes are either a parasitic drain on the battery or a faulty alternator. The battery is basically just a storage device which must be constantly charged by the alternator. A battery that is partially discharged often will...

Q: Car wouldn't shift properly and driver saw smoke - 1995 Mercedes Benz S320

Hello. I would first recommend having a full vehicle inspection performed by a qualified mechanic. The smoke could possibly be due to a fluid leak landing on the exhaust. The transmission may be leaking fluid, which could also be causing...

Q: Vehicle will not start

Hello. It sounds like your vehicle's security system is activated. In order for your vehicle to start again the system needs to be reset or disabled. This particular model of vehicle may have a small black button underneath the dash,...

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 Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...