How do you troubleshoot a catalytic converter?

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  • sparki
    Lv 5
    4 years ago

    The oxygen sensor is the basis of the closed-loop control system on a spark-ignited rich-burn engine; however, it is also used for diagnostics.

    In vehicles with OLED IX a second oxygen sensor is fitted after the catalytic converter to monitor the O2 levels. The O2 levels are monitored to see the efficiency of the burn process.

    The on-board computer makes comparisons between the readings of the two sensors, so you will have to determine:

    a) is the computer turned on

    b) can it identify both sensors

    c) is temperature control operational

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