I had the "engine" light come on about 6 months ago. I had Autozone check the code. It came up "EGR valve insufficiant flow" or something close to that. I bought an EGR vavle factory direct off of ebay and put it in. I cleared the code (disconnect battery). But after driving a few miles the light came back on. I had Autozone check it again and it came back the same. What am I missing? It is just a plug and 2 bolts.

 

I would assume you are missing the part about cleaning the EGR ports out at the same time as you replaced the EGR valve.

 

If you have a solenoid for controlling the EGR valve, that may be malfunctioning. Or the wiring and hoses may not be up to par.

 

ditto you need to clean the ports, Honda has a TSB out for this you may be eligable to have this done for free, yet.

Contact your local dealer for info.