Hi my Mazda 3 Automatic 2.3 sp5 2005, when I'm driving and the transmission changes from second the third the very strong release. And the strange thing is that there's no light on the dash, take a technic of transmissions and scan the computer and just saying scanner error. Please any solution !

 

How many miles or km on the vehicle?

When was the last transmission service?

Does it only shift hard between 2 to 3?

It may be electrcal. There is a transmission range sensor on the outside of the transmission. I would check if this is working correctly and connected correctly.

Try a different scanner. If it gives you the same result you have a problem with the car's computer wiring or the computer (PCM) itself.

 

MY MAZDA 3 2005 HAVE 107260 MIL, NEVER WORK THE TRANSMISSION and service, NOT YET CHANGE OIL A/T AND YES I THINK SO IS ELECTRIC PROBLEM.

 

Now we know why you are having problems!
The fluid should have been changed 2-3 times by now!

 

Also wasn't there a TSB for a reflash to address 2-3 shift shock, or was that 1-2?

And yes your trans. should have had the fluid changed several times by now. It's possible that changing the fluid now could actually damage the transmission, so I would look into that before having the fluid changed now.