Catalytic Converter on Toyota Corolla

Average mileage: 141,600 (83,000–190,000)
4 model years affected: 1999, 2001, 2002, 2003
11 people reported this problem
3 people shared problem details
1999 Toyota Corolla170,000
My Corolla had the P0420 code. The fuel line was recently serviced, and then this code came up within days afterwards. This car has been burning oil for years. I have to pour about 10 quarts a year into the car. I went ahead and got the catalytic converter replaced, though I am not sure if this was necessary. The car has 170,000 miles so I assumed that the part probably was worn out.
2003 Toyota Corolla125,000
I have 2003 Toyota Corolla replaced Cadillac converter twice within yr what could be causing this to go out
Engine burns oil which destroyed catalytic converter
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