EGR Position Sensor (2.0L)
WARNING: This page is about a different car, the 1994 Mazda MX-6 and 1994 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.
Disconnect EGR position sensor electrical connector. Check resistance across terminals. See Fig 1 . At room temperature, resistance should be 182-336 ohms. If resistance is not as specified, replace EGR control valve.