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Thread: What does ol-failed means on the fuel system status ????

  1. January 10th, 2013 #1
    400ss
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    Default What does ol-failed means on the fuel system status ????

    IM WORKING ON A 1993 Ford LIGHTNING whit a 2003 5.3L 4L60E engine/transmission, completely stock, everything is ok, only one problem, whit the MAF conected, the Pts hangs betwen 9-11% and he spark will go up and down up and down, and the FUEL SYSTEM STATUS SHOWS : OL-FAILED
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  2. January 10th, 2013 #2
    joecar
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    It means the NBO2 is not working.
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  3. January 13th, 2013 #3
    400ss
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    Quote Originally Posted by joecar View Post
    It means the NBO2 is not working.
    checked my o2s, the drivers side was disconeced, i dont know why. i conect it again and its working perfectly. thank you a lot
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