low idle on 2002 Chevrolet Astro

when i start the car its run fine and when the car warm up theres a low idle what the matter with the car why is there a low idle? and the Service Engine soon light is on.

by in Anchorage, AK on April 21, 2009
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2 answers
ANSWER by , April 22, 2009
Since a fault code has been set , if you scan the vehicle the information you get will probably answer your question. Many auto parts stores will scan vehicles as a courtesy.
ANSWER by , September 06, 2014
random missfire, also your mpg drops as you are driving, ?? i havethe same problem !!there is a idle air control vave but that didnt fix my problem ?