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OBDII readers are cheap or the can be very expensive. Its the software that comes with it that can make all the difference. Some of the cheap ones come with freeware software which may or may not have the functions you want. Know what you want to do with it, just get the codes or do you want graphs and instant MPG, Laptop, Hand held or one that connects to smart phone. Do your research before you buy.
If its a one time deal some of the auto parts stores will do the reading for you and reset the code.
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