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Old 10-21-2003, 04:55 PM   #1
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Default Checking for a bad 02 Sensor

How do you check for a bad 02 sensor using the autotap?
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Old 10-22-2003, 12:03 PM   #2
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The software I use shows the readings in mv. When the sensor is cold, the value should stay fairly constant. Once fully warmed up, you should see the value fluctuating between ~250 mv and ~950mv a couple of times a second. If your value stays constant, you have a bad O2.
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Old 10-22-2003, 12:27 PM   #3
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Thanks
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Old 10-22-2003, 12:28 PM   #4
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Also, check out this link -> http://members.aol.com/InjuneerZZ/ScanMast.htm

Fred really knows his stuff.
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Old 10-22-2003, 12:37 PM   #5
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Wow, great info here...
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