Ruff idle when first taking off runs bad but once rpms getup there it runs great runs good on the highway check engine light is on

It could actually be a few things. i would start getting by the car scanned, maybe at your local autozone or something alike. thats if you would like to fix it yourself. or if you want to try things out on your own, then start by checking the spark plugs. if they look good then might want to try seeing if you hear the sound the air being sucked under the hood(that could be a vaccum leak), by listening to the engine up close while its running. if you find nothing then the trip to auto zone would be a good idea for the scan, which is free