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2005 Subaru Forester - got a P420 code intermittently over the summer, replaced the Oxygen sensor, no luck. Replaced the muffler and Catalytic converter. Still get the fault code about twice a week. Any suggestions? -Bob , Crestline
You need to go to a dealer or a shop that has a high end scan tool. There are two ! Did you replace the manifold convertor and or did you use a after market converter. Subaru's are super sensitive when it comes to catalytic convertors.
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