check engine light on

i was under my hood with the engine running!!! i pulled one of the wires.. and the check engine light came on.. how can i reset it??? do i have to take it to the dealer????
 
Or you can run the car as normal. Provided you've reconnected the wire, the light should clear itself after about three on/off cycles.

Else, you can drive by my place and I can hook it up to the OBDII scanner I picked up last week. ;)
 
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