I Have An 01 Ae Max And Had Po420 Ses Code Come On About A Mnth Ago Got That Replaced Under Warranty And Now A Month Later I Get Po430 Code. Wtf? Was Just Wondering Has This Happened To Anyone Within A Months Period? I Know The Cats Are Bad On The 5th Gens But Dayum All In A Months Time! Its Covered Under Warranty Of Course But Im Just Wondering Later Down The Road Is This Replacement Cat Just Gonna Last Up To 60k And Thats It?

 

If you have had the cat replaced, then it is more likely there is something else going on. Could be an O2 sensor, leaking exhaust somewhere, computer reprogramming needed, etc.