Output Shaft Speed Sensor
WARNING: This page is about a different car, the 2003 Mazda Tribute, 2003 Mazda B4000, 2003 Mazda B3000, and 2003 Mazda B2300. However, it is still accessible from the selected car via links, so may be relevant.
Faults in Output Shaft Speed (OSS) sensor or OSS sensor circuit should set a DTC. See appropriate DIAGNOSIS article in AUTOMATIC TRANSMISSIONS.