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  1. MazdaSpeed3 Modifications
    Hey! Daughter bought a 2007 Mazda3 MazdaSpeed from NC and she lives in GA. It has a Cobb Tuner. There is a check engine light and the code is a P0012 Cam Shaft A timing Bank 1. All of the sensors were checked and are working properly. Could the Tune be causing the check engine light...
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