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  1. P0171 P0299 and P288C Codes on 2013 ATS 2.0T

    Cadillac ATS General Discussion Forum
    Hello, two weeks ago I had two codes P0171 and p0299 and they eventually went away. Last night I was driving on the high way when suddenly check engine light, service stabilitrak, and service traction control lights all came on. Also got an alert that said engine power reduced and speed limited...