I'm on MHD Stg 2+, fbo on my 75k mile n54 335i and would also love to learn how to read them myself for the future. Fueling completely new, all 6 index 12 injectors, hpfp, lpfp and fpr, and new updated lpf sensor with the line, If anything is wrong I'd love to know and fix it immidiately, as this is my daily driver. I do my own work and work in a shop
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