Can A Bad Catalytic Converter Burn Out The Downstream O2 Sensor


Question: Can A Bad Catalytic Converter Burn Out The Downstream O2 Sensor,
I got a p0137 code from a scan performed on my ’98 honda civic, meaning I have a bad secondary o2 sensor. I am afraid that the catalytic converter might be bad and burn out the new sensor I will put in. These o2 sensors are not cheap.Does anybody have any experience in this matter?

Best answer for Can A Bad Catalytic Converter Burn Out The Downstream O2 Sensor

Modern day catalytic converters are far superior to the bead types that came out years ago. These converters have a very long life span and normally only get plugged up if something else goes wrong with the car and isn’t promptly addressed.

I would say from your prompt action replacing the faulty o2 sensor that your catalytic converter is OK.

If it is plugged you will definitely notice it from the poor drivability and stalling issues, not to mention that all too familiar “egg smell” you will have.

Hope this helps. Good luck


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  1. Joemammysbigguns
  2. Gary O
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