CEL code P1139
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This is a discussion on CEL code P1139 within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; P1139 Front oxygen (A/F) sensor #1 heater circuit performance/range problem.. Ive gotten this code 3 or 4 times in the ...

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    CEL code P1139

    P1139
    Front oxygen (A/F) sensor #1 heater circuit performance/range problem..

    Ive gotten this code 3 or 4 times in the last 2 months maybe and I have absolutely no Idea where to start?? What does this even mean??

    Thank You guys in advance

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    He simply abides. SD_GR's Avatar
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    The front sensor is working intermittently. This is the worst kind of thing to troubleshoot. Check the wires and the sensor itself.
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  4. #3
    Moderator Donkey's Avatar
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    Probably time for a new front O2 sensor
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  5. #4
    Admiral Ackbar the 1st mycologist's Avatar
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    Do not get a universal sensor, it is pissing money in the wind.
    "From a little spark may burst a mighty flame." - Dante
    "The stitch is lost unless the thread is knotted." - Italian proverb

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    mycologist you always help me with all my problems! haha thank you I really appreciate it!
    Thank you guys for your help

  7. #6
    Admiral Ackbar the 1st mycologist's Avatar
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    Welcome, I'm glad it has been some assistance.
    "From a little spark may burst a mighty flame." - Dante
    "The stitch is lost unless the thread is knotted." - Italian proverb

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