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    B7 S4 - 02 Sensor Codes - P2198 / p0159

    Hello Everyone! I am new to the site, please go easy on me! I finally have another Audi and have been getting it ready for this winter. This is an 06 S4 that I am trying to revive from being slightly under appreciated. This 06 S4 has the Corsa Exhaust and the Catalytic converters have been...