Working on getting rid of codes in my wife's 2000 frontier. Getting one for the EGR. I go to make sure the lines are connected and there is no EGR valve. The port is covered and there is a plug in the exhaust manifold. I go look at my 2000 xterra parts rig, and same thing. So did the 2000 nissan VG3.3 not come with an EGR valve. If so how do I get rid of the code.