Question

I have already change the catalytic but the check engine still on with code P0430, I have an infiti g35x I don't know what else can I do.

Answer 1

Hi there

Sometimes replacing the rear O2 sensor can help with this. Also, if you didn't use a factory converter or have an exhaust leak the code can appear as well. Poorly running engine, fuel injector leaks can also cause the code to appear.