Service engine light under boost

[adidasdudegst]

So recently my GS-T has started to throw the service engine light every now and again when going into boost, or when there is added load on the motor. It comes on, then disappears when i let off the throttle, sometimes coming back on when i go to push the pedal again, sometimes not. If i go to give it more throttle while the light is on, it starts to bog/lose power. I have not done a boost leak test yet, but was curious to see if anyone thought the turbo could be going... I have 3" exhaust, intake, fmic w/ all hard piping, greddy rs bov, dsmlink (untuned). any ideas on what could be wrong?