manp111

Hi everyone,

This is my first post on this forum.

I have a 2001 S2000 with 120k miles. It has the CEL P0420 with the original Honda CAT.
I replaced the CAT with a Berk Technology 63mm test pipe. I cleared the code but it came back on. There is only this code.
In other words, I have this code with original Honda CAT and the test pipe.

Does anyone know what I can do to get rid of this P0420 code ?

Thank you in advance.

Halfassjack

Check your 02 sensor per service manual.

superchargedk20

The test pipe is Gona throw that code

manp111

That code by it self is the CAT.

Car Analogy

..or lack there of. Bad cat, no cat. Same code.