I've got a 2001 V6 and it sets a P0401 (EGR flow insufficient) first, and then a P0306 (cylinder 6 misfire detected). I have cleaned and checked the EGR valve, replaced the #6 injector, replaced the spark plugs and wires, and replaced the coil pack. Does anyone have any other ideas as to what this might be?

 

dpfe sensor is a common cause of the 401 code.

 

did you clear the CEL light yet?

 

It may be the dpfe sensor, I went to Auto Zone yesterday afternoon and they suggested it might be that so I replaced it. I drove it to work today (round trip 32 miles) and nothing has showed up yet, but I'm not sure how long it will take to reset the codes.

 

Yes, been resetting it after each repair.