obd code p0401. Understand 2004 crv has no egr. What could be causing this code?

A code P0401 most likely means one or more of the following has happened: The DPFE (differential pressure feedback EGR) sensor is faulty and needs to be replaced There is a blockage in the EGR (tube), most likely carbon buildup The EGR valve is faulty The EGR valve may not be opening due to a lack of vaccuum http://www.chinasinoy.com/wholesale/mvci-toyota-tis-honda-hds-volvo-dice.html this tool can do honda,you can have a look.

Go to youtube and look up scotty Kilmore (not sure if spelled correctly but it will come up)