02 Explorer keeps failing emissions

[wbcalvin]

4.0 V6 02 Explorer XLT has a code that says the EGR Valve is bad, but I replaced it with a brand new one. I even had my mechanic check everything and clean out the hoses. air intake, etc, but it still fails. This has been going on now for over 2 years, so every month I am forced to go to VEIP just to keep my tags from being suspended. Here in Maryland, you must spend $450 total in order to be given a pass, so that you're not required to do this every month, but the total work has come nowhere close to $450.

 

[EXPLORER04]

which code are you getting?

 

[wbcalvin]

These are new ones:

P0300 - Random/Multiple Cylinder Misfire Detected
P0302 - Cylinder 2 Misfire Detected
P0306 - Cylinder 6 Misfire Detected

Original One:

P0401 - Exhaust Gas Recirculation A Flow Insufficient Detected

 

[lincolnshibuya]

P0302 and P0306 could be your spark plug and/or coil pack (#2 and #6 plugs), fix that first. P0401 is sometimes simply an EGR sensor replacement.

 

[wbcalvin]

Thanks. After the tune up, I forgot about resetting the codes, so they're gone now. I'm sure the EGR one will be back though, so now I'll get that sensor replaced. Is that an easy fix?