2005 MERCURY MOUNTAINEER
140,000 MILES
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JOHNROBITAILLE
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  • 2 POSTS
where is location of bank 1, sensor 1 o2 sensor?
auto zone said there test readings show dem p2195, should i change sensor and where is it...passenger side or drivers side? i have a 6 cyl
Apr 10, 2013 at 4:23 PM
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WRENCHTECH
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  • 20,761 POSTS
That is the upstream sensor on the passenger side but a new sensor isn't necessarily going to fix it. It's indicating a lean condition on that side of the engine, not necessarily a bad sensor. It needs to be diagnosed properly and the sensor tested.
Apr 10, 2013 at 4:31 PM