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Where is this Valve Solenoid at if I need to change it?

You will never know if it is defective, unless you TEST it. Otherwise, all you are doing is throwing money and parts at the problem in hopes that the "shot gun" method will end up hitting something. A code identifies the circuit or sensor that sent a "bad" or out of parameter reading. It does not state the cause of that bad reading. After the code is identified, you must diagnose the cause of the code. Take an O2 for instance. If you get a code that reports a rich mixture, does that mean the O2 is bad? Or does it mean that because of some, yet to be discovered problem, that there really WAS a rich mixture. The same is true, especially, of codes pertaining to the EGR valve. Seldom, when there is an EGR code, is the EGR valve the cause. The [color=blue:906514afca]FSM[/color:906514afca] tells how to extract the codes, what circuit or device each code is related to, and most importantly, a trouble shooting chart to help you diagnose and track down the CAUSE of the problem, minimizing the expense of unneeded parts. The book isn't cheap, but depending on the job and the potential for false diagnoses, it can pay for itself in one job. Plus it has a lot of neat reading where you can learn a lot about how the systems in your car work.

RACE ON!!!