I am going to restate and aggree with
Nervous, don't use an aftermarket no name brand. You never know what you'll get. I also agree with
Nervous in the sense you should do your homework. As a DIYer, you have options that we, for a better term, don't have the luxury and cover ourselfs, don't. Without reading the threads that
Nervous posted(and I will) carbon from the modulator is the cause for the VSV to go bad. Carbon from the modulator comes from the EGR valve. With that being said, as a DIYer, what you can do, is remove the cap on top of the modulator, and carefully clean it out without destroying it. I have heard some success, I have also heard of some failure. The reinstall it. If the carbon is really bad, I would then suggest removing the EGR valve and look and see if ther is carbon buildup, if so, do a real good job of removing it. You may or may not be successful. When you put the EGR back on, don't forget to use new gaskets.
This may help your code and save you a few bucks, it may not, but it is an option you have that we might not neccessarily do for a number of reasons.
I know
Nervous may think that I just want to throw parts at you, and I assure you that isn't the case. I want your repair to go as smoothly and as uncomplicated as possible without you having to go back and do it a second time. I only offer you the wisdom of what I personally have seen over the years. Do your research and gather the information that has been provided to you in this post and others, and make the best possible decision for your situation. I do believe that
Nervous is truly looking after and in the best interest of the TN members, as I am. I just think we both go about it in two different ways, and that is okay. I will never, and never do, think I know it all.
Good luck