rlklawyer Posted February 6, 2008 Share Posted February 6, 2008 MY CEL AND TRAC OFF BUTTONS KEEP COMING BACK ON AFTER I DISCONNECT THE BATTERY AND AUTOZONE SAYS THIS IS THE CODE THAT INDICATES THAT THE ENGINE IS RUNNING TO RICH OR TOO LEAN. I HAD THE CATALYTIC CONVERTER REPLACED AT A MUFFLER SHOP FOR $135. TOYOTA WANTED $1200 TO DO THIS. THIS IS DRIVING ME CRAZY. I HAVE REPLACED BOTH THE BANK 1 AND BEHIND CAT O2 SENSORS AND IT STILL KEEPS HAPPENING. ANYONE GOT ANY IDEAS? CAR HAS 153K MILES BUT I WANT TO KEEP IT AS IT IS IN EXCELLENT SHAPE. Quote Link to comment Share on other sites More sharing options...
camlex Posted February 6, 2008 Share Posted February 6, 2008 P0420 code is for Cat. I did went with muffler shop he installed three different cat.(Magnaflow). CEL was comming back. Finally one mechanic installed from Orailly (Walker), No more CEL. Cat. is very tricky. I will call him tomorrow and find out Model#. Quote Link to comment Share on other sites More sharing options...
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