Parts stores are not shops. The code indicates a missfire for number 3 cylinder.
It could be a plug, wire, coil, injector, vacuum leak or no compression. Have it checked at a shop to confirm the failure.
August, 21, 2012 AT 12:06 AM
Most likely culprit is a faulty coil on that cylinder- switch the coilpack with one of the others, clear codes by disconnecting battery for 2 minutes and run it to where you had the codes pulled at. If the miss has moved, you need a coil. Wires do fail, but is usually not the case with Hyundai