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Old 02-02-2012, 08:26 PM   #6
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Thanks, the graph is from scanxl pro the voltage is 0 volts at the bottom, 1 volt at the top. The rear 02 sensor had failed and that is the new one, old one had o2 heater failure and no output. So there seems to be 2 schools, on a full dual cat system the rear is a flatline and the front is the cyclic pattern. On the smaller single cat they can both oscillate with the rear being of lower amplitude from the front. I'm just not sure what the correct SVT pattern is. Red is the front sensor, yellow is the rear.
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