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Catalytic converter gutting?

Discussion in 'Gen 2 Prius Accessories & Modifications' started by Sharnold, Sep 20, 2019.

  1. Sharnold

    Sharnold Active Member

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    Has anyone seen or heard of this mod on a Prius? Will it show Dtc because of back pressure reduction from the 02 sensor?

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    #1 Sharnold, Sep 20, 2019
    Last edited: Sep 20, 2019
  2. bisco

    bisco cookie crumbler

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    is there a link? i have ad blocker
     
    #2 bisco, Sep 20, 2019
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  3. Sharnold

    Sharnold Active Member

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    I corrected my post it was supposed to say mod* not model sorry

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    #3 Sharnold, Sep 20, 2019
  4. NortTexSalv04Prius

    NortTexSalv04Prius Active Member

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    #4 NortTexSalv04Prius, Sep 20, 2019
  5. Sharnold

    Sharnold Active Member

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    Ok let's try this again........ Has anyone ever heard of someone modifying/gutting the catalytic converter on a Prius? Would the modification cause there to be a loss of backflow/back pressure causing the oxygen sensors to read wrong and a DTC code to be present in anyway?

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    #5 Sharnold, Sep 20, 2019
  6. oldtechaa

    oldtechaa Active Member

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    They may have done it. However, please don't. By gutting a catalytic converter, a person doing this both breaks the law and causes very real harm to other people. There is a reason this is against the law.
     
    #6 oldtechaa, Sep 20, 2019
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  7. 69shovlhed

    69shovlhed Surly tree hugger

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    back pressure isn't what will set the CEL, its the incorrect voltage signal from the O2 sensors. I don't think there would be any advantage to gutting the cat; it worked with old carbureted engines, but the real choke point on a prius is gonna be the tiny exhaust pipe behind the cat. instead of ruining your cat, look into a custom exhaust system after the cat. whether there is any possibility of getting a bit more power is a whole other can of worms...
     
    #7 69shovlhed, Sep 22, 2019
  8. Sharnold

    Sharnold Active Member

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    Back pressure/airflow will set the DTC if you gut the cat because the exhaust is moving faster than 02 sensor can keep up with giving false readings..... I would never do this to somebody else's car this was a hypothetical question one of my friends asked about

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    #8 Sharnold, Sep 22, 2019
  9. Priusprofit

    Priusprofit Member

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    Don't gut your Prius cats! It won't work and they are valuable in scrap. If they have failed, replace them with high quality aftermarket cats, and sell me your oem units. You can contact me here or on my cell 6312915509

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    #9 Priusprofit, Oct 12, 2019
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