P0420 Cat Code vs. CATACLEAN - I think it worked?

My X is a 2011 with about 107k miles. Ever since I hit 103k or so, I've been getting intermittent P0420 code (passenger side cat). It first turned on for 100 miles on a road trip, and then went away for next 1000. Then it came back on for a week, off for a week, and has been like that for the

I'm getting the weed code p0420. Which do you think based on this running data, Catalytic converter or rear o2 sensor? The gm 3400 had previously been running poorly due to a

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I've been getting P0420 codes but have been wiping them using cataclean. Changed my oil yesterday and noticed a deposit of oil. Could this oil build up be the problem? : r/MechanicAdvice

Got P0430 Cat code what are my options?

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Code P0420??????

Cat converter needed?

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Mr. Gasket (120007-2PK) Cataclean Fuel and Exhaust System Cleaner - 16 fl. oz., (Pack of 2)

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2008 RAV4 P0420 Catalyst System Efficiency Below Threshold Bank 1