I have an 06 coupe. Just recently had a body kit put on it, got it back from the shop and my check engine light was on. It flashes when I give the car gas. The mechanics at the shop powerwashed underneath my hood so I'm thinking that has something to do with it. We took it to Auto Zone and had them hook it up to the computer and they said it was the 6th cylinder fuel injector. That was replaced and the problem still isn't fixed. Any ideas?