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reply to Anonymous_

Re: catalytic converter? P0420

said by Anonymous_:

getting a new issue

catalytic converter code P0420

P0420 Catalyst System Efficiency Below Threshold (bank1)

I think the o2 sensor needs replacement because of the fuel regulator issue ,cause it to get "dirty" due to the rich mixture.

Not worried about passing smog since that is 9 months away

I had it reset to see if it comes back on maybe just a fluke.
Not getting any smoke out of the rear end tail pipe.

Please no tree hugger crap in this thread .

i bought a 02 grand prix with a hollowed out cat and it was throwing this code, my 97 grand prix also threw it. replacing the cat fixed it.