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Originally Posted by lizem100
Should O2 sensor light come on if it goes bad? That is why I said in the first thread that the light did not come on.
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means little... they seldom do.
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Originally Posted by lizem100
Have digital multimeter but no duty cycle.
O2 sensor is 340,309 miles old.
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I will have to look up the math for you to test at the X11 connector without duty cycle... can be done... will post back with more info if you don't find it you may be able to verify bad o2 sensor there...