In my case, I am running a mess of mods with no tune on my 2010, and never ever got a CEL. That includes 40 plus dragstrip runs and three dyno pulls over the last two years!
Ported upper/lower, Stillen G3, Test pipes, CBE, 3.69 gear in a 7AT, etc...
Now, I used good fuel for power pulls, and watched my AFR and ignition timing using dash command iphone app. There was never any issue. The factory ECU compensates very well to changes, it has to in order to serve a diverse market.
Your mileage may vary.
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