I recently purchased an 05 Dodge Daytona Ram, 5.7L Hemi Magnum. About 30 miles on my way home a check engine light came on. It drove fine the 100 miles home.
Actually never have had any problems other that the light and the P404 code. Replaced the EGR valve with aftermarket valve and erased the code. 30 miles later it's back on. Researched and what I found most often is you have to use MOPAR OEM EGR valve. Shelled out the bucks for the OEM valve and installed. 30 miles later the code is back. I did check to make sure the tube from the manifold to EGR valve was clear. Just FYI, I did notice that the EGR valve I replaced originally didn't look that old, it was pretty clean. I am going to to the "disconnect battery" thing in the morning and see what happens. The truck seems to run fine and plenty of power, no stalling and smooth idle. I did replace the spark plugs, much needed. It has an K&N CAI on it as well. Any help will be greatly appreciated. Thanks
PS, I am mechanically inclined but lack in the electrical issues side. I do have a multi meter but am not sure how to use it to see if I am getting correct voltages. Should I visually be able to see the valve move? Oh ya, I was wondering what the cap covering an opening in the intake manifold right next to where the ERG tube connects is.