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2004 Jeep Grand Cherokee

 

Question: fault code 031 H02S bank 1 sen 1 heater ciruit low

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poppa bear, 4.0L 6 Cylinder, Esperance, NY, February 26, 2013, 10:47
 Rookie

replaced all 4 02 sencers code comes back within minutes any ideas

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  • Answer #1

    Randico February 26, 2013, 11:23
     Enthusiast

    The code is for bank one sensor one,this is the sensor at the number 1 cyclinder,the first 02 sensor, it should have 2 wire that have 12 volts or battery vaoltage and one ground ,and one signal, you are also fused, so in the engine fuse junction box you should see heater circuit listed on the cover.see if its open,also inspect the harness they do seperate

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    poppa bear, February 26, 2013, 13:05
     Rookie

    ok thank you ,i'll check that out and get back to you if it worked

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