P0401 code - what to do the second time?

[Grimlykindo]

I posted a while back about a p0401 code that my 98 accord v6 is pulling - I found out that at 65,000 miles (before I got the car) that the whole drilling and stint thing was done at the dealership. Now I have 122,000 miles and the code is on again.

Do I need to do the whole process over again? or can I just replace the EGR valve? I already have the Honda EGR kit with the new EGR valve, gaskets and stint.

[divinewisdom]

try pulling the EGR tube and use a vcumm pump to clean it out first the tube

if its not carbon build up, it could be a few issues.

-EGR vavle
-EGR pressure sensor DPFE

[Grimlykindo]

Originally Posted by divinewisdom

try pulling the EGR tube and use a vcumm pump to clean it out first the tube

if its not carbon build up, it could be a few issues.

-EGR vavle
-EGR pressure sensor DPFE

Thanks for the reply-
I got EGR kit from Honda online decided to pull my intake manifold off - It doesn't look like they drilled or put a sleeve in the first time! (the reciept from the dealership says EGR pipe recall) The carbon build-up was unbelievable! I pulled about 6 tablespoons of carbon out of the EGR port and got it looking brand new - I also cleaned the EGR port leading into the engine, which was not totally clogged but still dirty. I put in the new EGR valve, gasket and throttle body gasket.

But after I reset the light it came back on a day later! It eventually turned itself off, but now it back on again! There is no way that carbon is already blocking the port and I replaced the EGR valve and gasket, so it can't be that either.

If it was the "EGR pressure sensor DPFE" would it throw a different code then p0401? and would the light come off and on every couple days?

[divinewisdom]

Originally Posted by Grimlykindo

Thanks for the reply-
I got EGR kit from Honda online decided to pull my intake manifold off - It doesn't look like they drilled or put a sleeve in the first time! (the reciept from the dealership says EGR pipe recall) The carbon build-up was unbelievable! I pulled about 6 tablespoons of carbon out of the EGR port and got it looking brand new - I also cleaned the EGR port leading into the engine, which was not totally clogged but still dirty. I put in the new EGR valve, gasket and throttle body gasket.

But after I reset the light it came back on a day later! It eventually turned itself off, but now it back on again! There is no way that carbon is already blocking the port and I replaced the EGR valve and gasket, so it can't be that either.

If it was the "EGR pressure sensor DPFE" would it throw a different code then p0401? and would the light come off and on every couple days?

double check all the hoses you disconnected are back in proper order and tight.

[vietboi586]

also another thing that u want to consider try pulling your 02 sensor and check it to see if the tip is being clogged by the carbon deposit thats wat it sounds like to me