Code P0722, where is the output shaft speed sensor located?

Hello. I came across a TSB for the P0722 code. It may or may not apply to your vehicle. Here is the note from the TSB with the VIN range of vehicles it applies to.

2012-2013 Mazda3 automatic transaxle vehicles with VINs between JM1BL******732088 - 814225 (produced up to March 26, 2013)

According to pinpoint tests I have come across, you would need to have the TCM updated first. If the problem persists, then it is directed to replace the main control valve body.