Po420 Code Subaru

2000 forrester 150,000 miles regularly serviced. we had a po420 code What would you do? code p0758 Sprzedlo deaumas subaru forester 2010

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('09-'13)2000 forrester 150,000 miles regularly serviced. we had a po420 code 2009 subaru forester x (alberta, canada). 143k (km). i went for an oilSh forester help. does anyone know what this piece does? it's.

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