Black Death TA

any help as to what the probelm may be would be appreiated, but i know i didnt give alot of info, i cant really, cuz i dont know, so any help is appreciatedWEll, i was driving home last nast night and my service engine soon light came on, i was not running a y-pipe at the time, and i have numerous gfree mods done, what are the possibilites of it just being an 02 sensor rather than some other larger problem? this was about a minute after a quick run on the throttle that it came on, i have a manual, and i dint notice any strange noises after it caem onwe

CMNTMXR57

Need the code, otherwise we're all taking a shot in the dark that could be one of a hundred things!