You're right, it is a Check valve and goes nowhere. I've had my egr off several times and it is a snap. For future reference, you need to unbolt the fuel rail and pull up the passenger side slightly to get to one bolt. In fact, the hole thing is easier if you pull the closest injector (the connector at bare minimum) Other than that, a crescent wrench for the egr tube, 2 bolts, and you're done!