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  1. 2005-2010 Mustang GT Tech
    2005 Mustang GT Emission Light and OBD2 codes P2135, P2104, plus six others... My car kicks into Fail Safe Mode after every start now. So mechanical gurus, technical wizards, knowledgeable Mustang owners I think I have a new one here... (Have been unable to find another post with this issue.)...