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map sensor on 1997 nissan pickup 2.4 liter automatic.was told it on the right side.is it located on the moter or fire wall.

Being the manifold absolute pressure sensor, it is likely located on your intake manifold.

Look For Something That Looks Like This.

click link to photo of replacement part:

I have had them located on the PCM (not likely). It should be at a level as high or higher than the intake manifold. I have seen them also locate on a strut tower, for example.