Did you inspect the blinker function? That's probably all it is. Turn the left blinker on and you will likely find either the front or rear one isn't blinking while the opposite one is blinking faster than normal.
2013 GT Premium Brembo
MGW, Blow Fish, AM Hood Struts
Tinted, Borla Touring AB, ProCal Tune
Full Shelby/Kicker Audio Upgrade