2001 Honda Accord code po1491

Engine Performance problem
2001 Honda Accord 4 cyl Two Wheel Drive Manual 150k miles

I have a code po1491 on my 2001 honda accord stick trans 150k miles. It runs a little rough and the idle drops when I decel. It did die out a few times.I think this code refers to the egr valve.I looked at the exhaust manifold at the front of the eng compartment but dont see the egr valve to check it. Is there a tube coming from underneath to the bottom of the intake manifold. Am I even close in trying to figure out this problem