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1999 Es 300


rlklawyer
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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.

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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#.

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