My check engine light just came on the other night on the way home and I was wondering what it means exactly. I know that it has something to do with the emissions but what part, I don't have a clue. I know that my 6th cylinder is almost shot due to oil leakage in the cylinder...if it is sensing too much oil in the exhaust? I don't have many mods to the exhaust, just Flowmasters, and I have a superchip. Not sure if I should just reset the computer and see if it stays on or what? Does anyone have any suggestions?

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97' F150 4x4 4.2L V6
3.55 Gears
K&N Filter, Superchip
Flowmaster Dual exhaust
265-75-R16 BFG TA/KO
2 12" JL subs w/ 300W Kenwood amp