As you can see, there are many things that can be the cause of an idling problem. This section will attempt to narrow it down, but expect some trial-and-error. Skip to the section that applies to you: Engine Idle Is Too Low Or Stalls or Engine Idle Is Too High. They are in a general most-likely-to-occur order.
1 Get inside a home, building, or hard top automobile (not a convertible). Although you may be injured if lightning strikes your car, you are much safer inside a vehicle than outside.  Remember, rubber-soled shoes and rubber tires provide NO protection from lightning.
Do a hard reset If you don't want to try either of the above options, you can reset your check engine light the hard way. Disconnect the car battery. The on-board diagnostics require some power to save the memory of the fault codes it's picking up to trigger the check engine light. Leave the lights on and press the horn for several minutes to drain the last bit of electricity.