I replaced my #3 fuel injector today. Now I'm showing code P2021. After searching (admittedly, my search-fu is weak, so please point me in the right direction if this has been answered before), all of the issues that I see with this code are from disconnecting the TGV sensor. In my case, apart from having to remove the coolant reservoir to get to the injector (there didn't seem to be much room if I just tried to move it out of the way), the only thing I took off was the connector at the top of the injector itself. Could the TGV have unwound just from pulling the injector out? I checked the connection on the TGV and it seemed to be secure, as well as what I could feel of the connector on the injector. Is P2021 even for the TGV on the passenger side (it said bank 2), or could I have somehow done something to the driver's side of the engine?