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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 ...

  1. 02-09-2012 04:20 PM #1
    deano23
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    CEL code P1139

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    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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  2. 02-09-2012 04:34 PM #2
    SD_GR
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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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  3. 02-10-2012 06:45 AM #3
    Donkey
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    Probably time for a new front O2 sensor
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  4. 02-10-2012 06:47 AM #4
    mycologist
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    Do not get a universal sensor, it is pissing money in the wind.
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  5. 02-11-2012 11:50 AM #5
    deano23
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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
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  6. 02-11-2012 02:08 PM #6
    mycologist
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    Welcome, I'm glad it has been some assistance.
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    "The stitch is lost unless the thread is knotted." - Italian proverb
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