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Oxygen sensor voltages on a 1993 Subaru and most other vehicles should, with the sensor fully warmed (above 600 degrees F) vary rapidly above and below .45 volts. The range of fluctuations can be from .1volt to .9volts. A digital voltmeter will usually average these voltages to about .45 volt. Lower voltages indicate a lean mixture and higher voltages indicate a rich mixture. A scan tool or oscilloscope is necessary to see acurate live voltage changs on an oxygen sensor.

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โˆ™ 2009-02-25 19:23:37
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Q: What should the output voltage of a 1993 Subaru Imprezza oxygen sensor be?
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