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Thread: O2 sensor issue? Car acting sluggish

  1. #1
    Join Date
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    O2 sensor issue? Car acting sluggish

    My car has been acting sluggish. Especially when accelerating.

    No check engine light. But noticed this on inpa. I’m not to familiar with this vehicle and the o2 sensor set up.

    Does this look like a faulty bank 2 post cat o2?



    d7d dice roller

  2. #2
    Join Date
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    2001 750iL DD74441
    Certainly doesn’t look good for the O2 sensor. 0V is never supposed to be there.
    Your trims also give an interesting story though. The large negative additive with near 0 multiplicative indicates a potential MAF issue as well. Readings like that can mean the MAF is in the process of failing.
    So don’t be surprised if you sort the O2s that either the MAF throws a code or you still have symptoms.


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  3. #3
    Join Date
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    99 840ci Sport Indv
    Yes, I immediately thought 'MAF' when I saw the adaptation values!

    P.S. You don't have post-cat sensors, so 0V is normal
    Last edited by Timm; 05-20-2019 at 08:44 AM.
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