Check Engine Light After boosting hard

[mpm174]

i kno this is stupid...after i turn the boost up and run it for maybe 5 min hard driving the check engine light comes on....it doesnt if i dont turn up the boost....i was thinking o2 but not sure....any comments will help....

 

[92awddsm]

What kind of vehicle are you working on? You profile needs to be updated before any of us can begin to give you ideas.