This is a very common problem on that particular engine. The intake has to be removed to access the port. There is actually a recall on this so you should be able to get the dealer to do it for free.
October 26, 2001
* Applies To:
1998-00 Accord V6 - ALL
2001 Accord V6 - 4-door from VIN 1HGCG1.1A000001 thru 1HGCG1.1A058564
2-door from VIN 1HGCG2.1A000001 thru 1HGCG2.1A023388 *
Updated information is shown by black bars and asterisks.
Accord Warranty Extension: EGR Port Clogging
(Supersedes 99-085, Product Update Campaign: PCV Hose Routing, dated March 21, 2000)
In some areas of the U.S, certain basic chemical properties of gasoline (regardless of brand) may cause the intake manifold EGR port to clog or the EGR valve to tail. If this happens, the MIL comes on with a DTC P0401 (insufficient EGR flow) or P1491 (insufficient EGR lift) stored.
* WARRANTY EXTENSION INFORMATION
This warranty extension cancels the PCV hose routing Product Update Campaign. You should no longer install the PCV hose routing kit.
American Honda is extending the warranty on EGR system problems in the affected vehicles to 8 years or 80,000 miles, whichever comes first. To be eligible for coverage under this extended warranty, the MIL must be on with one of the above DTCs stored. Install the EGR pipe kit, and file a claim using the information in this service bulletin.
1998-99 vehicles - Owners of vehicles that were subject to the PUD will be mailed a letter explaining that the PUD has been cancelled, and detailing the 8 year, 80,000 mile warranty extension covering EGR system clogging.
1999-01 vehicles - The original PUD applied to V6 Accords through the first part of the 1999 model year. This warranty extension adds the remainder of the 1999 model year, all of 2000, and part of the 2001 model year. Owners of vehicles that were not involved in the original PUD will be mailed a letter detailing the 8 year, 80,000 mile warranty extension covering EGR system clogging.
Saturday, March 31st, 2012 AT 10:14 AM