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  1. Intermittent P0440 and SES light, performance loss

    E39 M5 and E52 Z8 Discussion
    Have this strange issue: When I got the car, the first time it needed gas I put a tank of Shell gas in it. The SES light came on shortly thereafter. Code was P0440. Some quick searching on here showed it to be common and not too big of a deal. Fine. figured I would deal with it in due time...