How Long Can You Drive With a Bad Catalytic Converter?

Overview

  • How Long Can You Drive With a Bad Catalytic Converter?
    A bad catalytic converter can cause excessive pollution.

It Can Be Driven Indefinitely

  • A plugged catalytic converter will only in extreme cases prevent you from driving your car. You can usually drive your car indefinitely with a partially plugged converter, though you will see a drop in performance. The converter might become completely fused almost immediately or over time and then would require immediate replacement.

    How Long Can You Drive With a Bad Catalytic Converter?
    Replacing a catalytic converter

It Can Burn Through Over Time

  • When your engine is burning oil or running too rich, your catalytic converter's inner fiber may be "burned through." If the converter is burned through you can still drive the car as long as you want, but will notice some smoke and a smell.

    How Long Can You Drive With a Bad Catalytic Converter?
    Refilling a car's oil tank

Bottom Line

  • Most catalytic converter problems do not prevent your car from functioning, but if a catalytic converter is completely plugged you should not drive your car at all. If you live in an area with smog checks, you will not be able to legally drive your car without having the damaged converter replaced.

    How Long Can You Drive With a Bad Catalytic Converter?
    Vehicles with blocked catalytic converter should not be driven