Engine light on Catalytic converter RX400H?

My 2006 Lexus RX400H got engine light on. The diagnose showed Catalytic converter? At Auto zone suggested add Cataclean fuel cleaner. It worked for 3 months then 2nd time added same again. One month later again light is on . Added 3rd bottle. Now just 1 day later light is back again. Any suggestions please 122500 miles on.

7 Answers

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  • elhigh
    Lv 7
    8 months ago

    REPLACE.

    THE.

    CONVERTER.

    Stop trying to pour in a fix. Those are never better than merely temporary, assuming they ever do anything. Catalytic converters need periodic replacement, bite the bullet - and the bill - and replace the converter.

  • 8 months ago

    DUH...replace the catalytic converter?!

    Source(s): Mitsubishi Master Tech
  • Anonymous
    8 months ago

    It is time to replace the cat converter. 

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  • Anonymous
    8 months ago

    Catalytic converter cleaner will clean out a catalytic converter temporarily the object of course is to pass inspection it's not a permanent cure the permanent cure is to replace the catalytic converter

  • Ron
    Lv 7
    8 months ago

     Converter cleaner? I have a suggestion. Find out why the code popped up and fix THAT. Hint: It may not be the converter

  • .
    Lv 7
    8 months ago

    Change the spark plugs, ignition coils, and upstream O2 sensor.  That's assuming they have never been changed before.

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