P0431 Code

I read that it is the cat on the driver's side. The CEL has been coming on a couple times in the last month. Should I pursue replacing the CAT? I wonder if my previous issues with the misfires caused premature wear on the CAT???

Thanks

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Originally Posted by cruzanrs6

I read that it is the cat on the driver's side. The CEL has been coming on a couple times in the last month. Should I pursue replacing the CAT? I wonder if my previous issues with the misfires caused premature wear on the CAT???

Thanks

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Was this the O2 sensor that had the wiring issue? Also, this O2 sensor monitors the pre-cat, so replacing it means essentially replacing the downpipe. In any case, this is an emissions issue only and should not affect drivability. If it really is a cat issue, you could also try the O2 'cheaters' like the ones I used when I gutted my precats.