2009 Pontiac G8
Check all your connections first. you really need to make sure they're good. this issue is not for a rookie because it can come down to a defective PCM... But if you are willing to try and fix it right then
http://www.gmforum.com/obd-ii-trouble-shooting-153/p0523-286000/
be very careful and make sure you have the proper tools and wiring diagram for this circuit !!!
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