Took my 2019 in for Cam Phaser noise and CEL on. 40K miles It showed Bank 2 cat efficiency below acceptable levels also. Dealer is replacing the Cam Phasers, Timing Chains and Tensioners plus the Right Cat. Anyone have just one cat go bad? I asked how they diagnosed the cat issue and if something else maybe causing the cat to go bad. He said the computer states its bad. Can Ford Techs see random misses if they don't set a CEL? Not into taking truck back for cats every so often. Maybe its a bad cat but I've never seen one go bad without another issue being there.