Hi [USERNAME]! Let me put the Zoom Zoom back in your Mazda!

The first thing you want to do is check the level and condition of the transmission fluid. If it is low then top it off and if it is very dirty you will need to have it flushed.

This could be a problem with the solenoid, the shift valve or the Transmission Control Module

The Mazda diagnostics for this code aren't that good. Basically if the fluid is good then they want you to replace the valve body.

This would cover the solenoid and the shift valve at the same time.

Did this start after changing the fluid?

It sounds like there is a mechanical problem which is going to require replacing the valve body.

There could be a short on the wire controlling the solenoid. That would have to be checked with a meter and is a somewhat involved procedure.

The solenoid is attached to the valve body.

Bear with me here... there is a bit of information to relay on checking the solenoid

Shift Solenoid A is terminals I and J on the connector going into the transmission

If you disconnect the plug and look at the side connected to the trans

It is the 5th column over top and bottom pins.

You can measure the resistance there first. Should be 14-18 ohms

If all is good there then plug it back in and you will have to backprobe the wire to check and make sure it is not being commanded on with voltage at all times.

If all is good there then you need to get inside the transmission and examine the valve body

You can try swapping the shift solenoids to see if the problem changes

The shift solenoids have 1 wire connector and get grounded through the body of the sensor

Shift Solenoid A is in the row of 4 solenoids... it is the one with the electrical connector facing the opposite way

To answer your question about backprobing... that just means you will need something like a safety pin to push in through the back of the connector to touch the wire or you can pierce the wire insulation and measure like that

just be sure to cover the spot that you pierce if you do it that way

Shift solenoids B and C are also in the row of 4 solenoids

They are one the opposite end.... once you get in there you will see what I am talking about.

I'm not sure if Mazda sells them individually

http://www.electricaladvantage.net/

You can check them out... they sell shift solenoids, they may have yours

http://www.transtec.com/tech_insert/94231.pdf

Check this link out for some diagrams

I don't have part #s or pricing for these solenoids... you will have to call the dealer and check that link

http://www.makcotransmissionparts.com/

The only other thing is to remove and disassemble the valve body to check the movement of all of the shift valves. Not something for the faint of heart.