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  1. Bad O2 sensor? Need help!

    Maintenance Tech
    I just got the light of death on my fj. I saw the engine light come on along with the ESP light (the car with a squiggly line). I get back to the house and hook it up to the code reader and get P0031 HO2S heater control circuit low (bank 1, sensor 1). I did some online research and I believe...
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