hello,
just wanted to share that I had a trouble code 80/p0401 on 2001 accord ex v6/ egr insufficient flow detected popping up everytime I would reset my pcm and I did some research and discovered this is a common issue in the 98-02 v6 accord and what happens is the egr port is small and carbon builds up and blocks the flow and makes the valve stick and not operate properly. DONT PANIC! I GOT RID OF THE CHECK ENGINE LIGHT FOR 4 BUCKS! all you need is a bottle of carb cleaner and some basic car tools and an hour or 2 of your time. Go on youtube and watch video on this and I suggest this is the first thing you try before going out and buying an egr valve that you do not need. Chances are this will prob be your problem as well. I haven't got the light back one time since I did the cleaning and I would say performance is even better. hope this helps someone have fun guys

 

Good to know. I know this is a common thing for the 4-cyl engines but I haven't jumped in to suggest that for your thread. Mostly because I didn't really know if the same thing applied to the V6.

 

yea she was clogged pretty good gave it a good cleaning just take off intake manifold 9 bolts (in order evenly look it up) I unhooked from throttle body nice and easy and 2 bolts on egr valve spray valve while you work it up and down spray 2 ports on engine and clean out small port on manifold really good with carb cleaner and a flat head.i got 180,000 on her and got the light I would say if your creeping around 200,000 it is a good idea to do this maintence