re: Paging O-T Mechanics

If it's misfiring and idling at high RPM it's likely your ignition coil/spark plug as mentioned. Limp it over to advanced auto - have them pull the code and replace yourself. You will need to buy a spark plug socket but it's really pretty simple. Typically it's just one or two coils that have gone bad which you'll have to replace and swap around to figure out. I recommend just replacing them all so you don't have the issue later. GL