Why my check engin light ligts when I drive efter five minutes,

Check engine light illuminates when the ECU has determined a fault or possible fault with an emmisions related system. This, at times, may nor will not cause a drivabilty problem. I would recommend geting your vehicle inspected as soon as possible to know what is causing the fault. At times it is something as easy as a loose or malfunctioning gas cap. Good Luck!

buy a cheap OBDII sensor plu it in and check the code, this will also reset the light if that's the only problem.