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  1. Oxy Sensor

    Alfa 147, 156 & GT
    My EML came on today with code P0150 "O2 sensor circuit malfunction (bank2 sensor1) looking down at the manifold I see there are 2, any idea which is bank2 sensor1? The previous owner said he had just had one replaced but they both look fairly new to me. I couldn't feel any difference in...