P0420 code “Catalyst System Efficiency Below Threshold (Bank 1). Changed 02 upstream sensor Reset code by disconnecting battery 1 hr Check engine light has been going on and off since not blinking. But in for ahile then off. Usually comes on while driving then off next time I start it then back …

P0420 - 2002 Toyota Camry

dolores23rollinger_162923 February 4, 2020, 7:55pm 4

None that. I have noticed, I will definitely have to check thoroughly

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