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2009 outback o2 sensors

Fatenarr
in 1990 to Present Legacy, Impreza, Outback, Forester, Baja, WRX&WrxSTI, SVX

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Hi everyone my 2009 outback has thrown the p0420 code and is idling rough while at red lights and fuel consumption has gone up lately. I haven't replaced the sensors since purchasing the car at 77,000 miles and it's now at 150,000. Does anyone know what brand the oem sensor is that was originally used?

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