if you have a HX model, then you do have an egr. if you are getting a p14xx....i forgot what the code was but it should say something along the lines of "faulty EGR"

this was a recall back in the days for the HX. if your car is under warranty (which i highly doubt), honda will fix it for free. if not, then it will cost you somewhere around 200 to diy. the egr valve does not always go bad, but is almost impossible to clean because you cannot disassemble it completely. they are like $110 bucks. The MT model uses an electric one which is a little more costly than the AT vacuum type. You should not only change out the valve but also can clean all of the support parts of the egr system such as the egr chamber plate, all of the runners inside the plate, and the hose that attaches the egr to the manifold. Change out the chamber gasket, the egr valve gasket (usually comes with the part itself), the injectors o rings + seal rings + cushion rings (because it will be taken off to access the plate), and a tube of oem honda silicon (must be sensor safe if any other brand). I use to get pay $250 dollar commission per vehicle back in the days for working on these....so imagine how much you would be paying the dealers....


fyi: honda have a special tool for cleaning this stuff but i guess a probe, some rags, a toothbrush(do not use wire brushes) and some carb cleaner will work just as good