Hello Scotty, I have a 2020 Chevy traverse 34000 miles on it and I now have engine code p0420. Turned it on the next day and now code is gone. What do you suggest I do? Should i change O2 sensor or possible catalytic converter bad? Is there anything...
First, your car is still under warranty (2020 model), no?
Second, … what’s your habit driving this poor thing of yours? Numerous short trips? Lots of idling? Lots of stop ‘n go congested traffic driving? No prolonged highway drives? All that can trip an errant code P0420/430.
Anyway, … drive a bit. Do a bit of driving like an Italian, and see if code disappears and stays that way. If it returns, … let the dealer sort it out for you. Warranty.
F.S.
I would keep driving it and see what happens if you do not have drivability issues.
