Honda Oddessey 2000 with P0401 code

I had a code P0401 November 26 and i changed the EGR valve on it and cleared the code. Now i'm getting this code again. any ideas or help will be appreciated. Why am i getting this code again? What am i doing wrong?

Where did the valve come from? Let me guess AutoZone...Honda sell a kit you get everything you need to do this job right..Think it is around 100.00, at least in the atlanta area, anyway you get a oe valve, a throttle body gasket, and a oversized tube that goes into the hole for the egr passage. You have to remove the upper intake to do this but not hard at all.

Thanks asecmt for your response. i bought EGR valve from the dealership and paid $200 canadian and it came in the box. since my Oddyssey has only 91000Km on it i buy all the parts from dealership.any other idea, please let me know. thanks

Did you remove the intake and clean out the passage? This is the only way to clean it no chemical will clean it out. A valve and port cleaning always fixes this problem on a Honda.

Thanks again asecmt, no i didn't clean the intake but now i will. what should i use to clean the passage just a rag on use some kind of cleaner. i'm waiting for your feedback. thanks.

I don't know your experience level but the repair is pretty straight forward...You remove the engine cover and the air filter duct to throttle body. remove the 4 12mm nuts that hold the throttle body to the upper intake (gasket usually does not break but be carefull anyway) you will see a couple of connectors on the back side of the intake and the vacuum hose for the brake booster, disconnect all that, and remove all the 12mm bolts that hold the upper intake to the lower and then lift the intake up and you will see the hose for the pcv still connected to the intake so be carefull not to break it. Once you remove it turn the the intake upside down and you will see, close to where the throttle body mounts, a hole about 3/8 in diameter this is the port you can take a drill bit or a screw driver to clean it out. Be sure once done cleaning you blow the intake out with air to gat all the chunks of carbon out.

Thanks asecmt for your detailed explanation. you are right my experience level is not that high but i like to do as much as possible myself and i also try to learn. i thought by changing the EGR valve will do the trick but it wasn't enough. i bought Haynes Repair Manual a while back that helps me too. that does't say what u described and i really appriceate it. i will do as you said, i know i can do it. as soon as i get some wather like u have in Atlanta. it is verry verry freezing in here in Tononto. thanks again.

Thanks Asecmt i finally got good weather and i did clean that pasage you described and its been two weeks. car is running fine without any codes. thanks again.