BIGBLUE1212 Posted October 12, 2006 Share Posted October 12, 2006 how do you backprobe an o2 sensor.....do i disconnect the sensor and stick the probing wires in the back? if so which wires do i put the probe wires on? Quote Link to comment Share on other sites More sharing options...
nipper Posted October 12, 2006 Share Posted October 12, 2006 nipper Quote Link to comment Share on other sites More sharing options...
porcupine73 Posted October 13, 2006 Share Posted October 13, 2006 What are you trying to see? I'd think you'd really need to connect on oscilloscope to see the signal. If the sensor is heated, you'd have to leave the connector plugged in I would think so the heater could function. If you have an o-scope I'd just probe each wire on the harness until I saw a signal. If it's heated one (or two) of them should be ground, one should be +12V, and one should be the magic signal, not sure of the amplitude, maybe 1v-pp. I think it's generally suggested that you do not use those probes that pierce the insulation. Quote Link to comment Share on other sites More sharing options...
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