Question…

I only have 2 Oxygen Sensors in this vehicle. One Upstream and one Downstream.

If I were to change the Upstream should I change the Downstream as well??

Why I’m changing my upstream you ask??

I am seeing noticeable affects off the vehicle running rich. Too much gas consumption than normal

    • ThurmanPmurman@alien.topB
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      10 months ago

      A simple scanner would be enough to tell you if you have a bad O2 sensor, the fancy scanners are not needed for that. I would bet on your O2 sensors being ok. One thought that came to mind, is your temperature sensor ok?