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Thread: Closed loop enable failure

  1. 1 Day Ago #1
    BuildDontBuy
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    Closed loop enable failure

    I finished the tune on my truck and wanted to let it go back in closed loop and after letting the engine warm up it said OL-Fault. I do have my AFR gauge in so I am missing an 02, and I already changed the misfire criteria temporarily so that doesn't cause an issue. Any other clue why it won't open into closed loop and is there any way to get it to go into it any faster? Also a note my idle is lean but if I rev it the AFR get's almost stoich (don't have that in the log provided).
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  2. 18 Hours Ago #2
    2xLS1
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    Quote Originally Posted by BuildDontBuy View Post
    so I am missing an 02.
    Do you think maybe it needs both pre cat O2s to go into closed loop?
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  3. 7 Hours Ago #3
    RDF1
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    Yea your oxygen senors arent reporting. Are they hooked up?
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