Hello,

I have replaced the cat about 4 months ago and O2 sensor, recently replaced the fuel pump and now it’s pulling the P0420 code. I’ve put more money than it’s worth into this car and I’m not willing to replace the cat again. I JUST replaced the cat so what is the possibility this is the cat again? Is there something I can do to fix this?

  • TylerNelsonAuto@alien.topBEnglish
    1·
    10 months ago

    Did you replace the original Cat with an OEM? If it was a cheaper aftermarket unit it is very likely the Cat again, about 50% of the aftermarket Cats I’ve installed on vehicles were insufficient right out of the box. We only recommend installing OEM converters.

    • sock59@alien.topOPBEnglish
      1·
      10 months ago

      My mechanic replaced it, my husband believes it was oem, could there be a more root problem? Like something causing the cat to fail?