What does it make a mazda tribute sound like when the o2sensor is bad?
If the O2 Sensor was faulty your CEL would be on and mileage would be reduced. If you have a sound, your looking at another issue.
Usually sounds the same as if it were good but as Tom says ~~ "CEL~~ (C heck E ngine L ight) would be on and mileage would be reduced."
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