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Old 09-25-2003, 09:48 PM
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yal yal is offline
Join Date: Oct 1999
Location: New York, Long Island
Posts: 2,705
Testing O2 sensor

I found the following quote in an old thread by Barrie. What does he mean by "shorting the input"?

Testing Sensor Element: measure the output voltage of the sensor ceramic (black wire) under full-rich conditions; create this condition by shorting the input to the ECU (green wire). Specified tolerance is 0.45 - 1.0 VDC. Mine measured 0.48, suggesting that the ceramic element is getting weak.
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