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  1. Need help on Error codes p0420 and p1304 ,

    9-5 Workshop
    Hello Everyone! A short version of a long 5 month's story is: Since June 2013, my Saab 95 Aero '06 started to throw P0420 codes, which was generated by a clogged turbo and a worn out CAT, , as the service informed me. Since then the Cat and both O2 sensors were changed, turbo rebuilt, but...