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running lean

  1. E39 M5 and E52 Z8 Discussion
    My M5 is currently pulling the following codes: P0113 - Intake air temperature sensor 1 circuit high bank 1 P0411 - Secondary air injection system incorrect flow detected P0174 - System too lean bank 2 P0171 - System too lean bank 1 Now for some background. The PO that I bought the car from...