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  1. G

    Downstream O2 Sensor Help

    This screen shot is from this morning. Last night it was reading .4 V on o2 bank1 sensor 2 Sent from my iPhone using Tapatalk
  2. G

    Downstream O2 Sensor Help

    What should I be reading voltage wise from the vehicle across the heater terminals? What about the O2 sensor? Sent from my iPhone using Tapatalk
  3. G

    Downstream O2 Sensor Help

    ownstream O2 Sensor Help! All, I cannot pass the DEQ emissions test because I cannot seem to keep my O2 sensor working for more than 1 day. I have replaced my O2 sensor, twice now and get the same results. I get a P0138 code. I have a 2000 Jeep Cherokee Classic 4WD, XJ. Initially, after...
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