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    P0420 How To Diagnose A Bad Catalytic Converter -EricTheCarGuy

    JamesRoss
    JamesRoss - 218 Views
    455
    218 Views
    Published on 01 Dec 2023 / In Cars and Vehicles

    Get a laser thermometer and test if the catalytic converter is creating heat. That means it is working and your sensor is likely the problem.
    Stable voltage of 1/2V for downwind sensor is normal.

    Source: https://www.youtube.com/watch?v=9VZ5K8n5jj0

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