On the 1997 Mazda Protege, the P1195 is pointing to a fault with the EGR Boost Sensor, not the EGR Valve itself. A very common problem here is a vacuum line to the EGR Boost sensor that has a crack, hole or loose/missing connection. I’ve also seen the “nipple” at the bottom the Boost Sensor (that the vacuum line plugs into) break/crack. SO- best place to start here is by inspecting the vacuum lines to the Boost Sensor. Inspect the sensor itself as well. Inspect the electrical connector and as far up the harness as you can, looking for any loose, broken or melted wires. If the visual inspection checks ok, replace the Boost Sensor. It’s mounted under the hood, passenger’s side corner.
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