I’ve got a 2012 Ridgeline. It’s rear wheel drive.

I’ve got a p0420 and a p0 741.

The recommendation I got is to replace all the catalytic converters for the 420. Then replace the transmission for the 741 code.

Those are pretty high ticket items for an 11-year-old vehicle.

Is there any way to narrow down which cat might have a problem?

Would simply replacing the torque converter address the 741 code?

I don’t have a lot of experience with Hondas specifically and these codes.

What diag could I do to confirm that I need to replace all of the cats and the transmission?

  • Gunk_Olgidar@alien.topBEnglish
    1·
    10 months ago

    Would simply replacing the torque converter address the 741 code?

    Probably.

    ​

    Is there any way to narrow down which cat might have a problem?

    Yes with the right diag tools, but most likely not worth the effort. When one cat goes, the other usually follows shortly thereafter. Especially since you didn’t state mileage on the car and didn’t list any other P codes, one can only presume it’s high, there are no other codes, and thus both cats are most likely toast.