I have a 2007 Nissan Sentra. I am getting a P0420 code.

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4 months 1 week ago #203086 by ferd
I am getting a P0420 error code which indicates a bad catalyctic converter. Just wondering if anyone hd any experience dealing with this problem. I am checking out oxygen sensors they dont seem to be working right. Any advice would be appreciated.

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4 months 1 week ago #203088 by college man
check for any exhaust leaks. if none found then your o2 sensor is reporting that the cat is not cleaning up to spec.
A cat would be needed.

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