I have a 2004 ford explorer 6 cylinder. I need to get the car registered, however the check engine light is on. I checked, and the code is PO401 Exhaust EGR flow insufficient. I have been bad and running it below a quarter tank on average for the past year. When I start the car, it idles rough and sometimes shuts off. I decided to fill the tank to ¾ and the car stopped its rough idle within a few days. I need to get this car smogged asap. Any idea as to the source of the PO401?
have the same problem?
Tuesday, February 23rd, 2016 AT 2:06 PM