Quote:
Originally Posted by CrisZenithBlue
I'm still a bit confused about the O2 reading a flat value..
is it the O2 sensor that's dead or the cat?
maybe an easy way to find out is to switch the left and right O2 sensors and see how they read? those damn sensors are about 100$ a pop..
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That is a very good idea. Also you can test with a voltmeter. O2s actually produce voltage, it is not a signal from the computer and then a return signal like other sensors. You have the heater wires but the 2 white wires should produce voltage and you can verify that way if it is the o2 or if it is a wiring problem. I work on a lot of cars and keep plugs off old o2 sensors and scrap cars o2 connectors with extended wires so I can just plug into it and test it in a convenient location rather than underneath the car.