Originally posted by Brett64:
Well my cheesy manual says testing an O2 sensor is beyond the scope of the DIY. Two of the terminals on the sensor measured 3.8 ohms. The other two didn't read anything. Other than that I don't know how to test them.
The two terminals that did show resistance are the heater elements.
The other two are the sensor itself which is not a resistance-type device.
If you really want to test it, remove it, connect a voltmeter to the two sensor elements, and heat the tip with a propane torch while watching the voltmeter. A good sensor will start generating voltage (up to aroun .8 or .9 Vdc when it gets hot.
Steve
98 Contour SE Sport 2.5 Duratec ATX The wifey's car
89 Taurus SHO - 246K miles
94 SHO ATX - 190K
1997 F-150 5.4L ATX - The Workhorse 150K.
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