HAVE REPLACED THREE EGR VALES IN PAST 6 MONTHS,LIGHT BACK ON AGAIN.HAVE CLEANED THROTTLE BODY STILL NO GOODHAD CHECKRD AT AUTO ZONE CODE READS INSUFFICENT AIR FLOW.ANY SUGGESTIONS GOT TO GET INSPECTION NEXT MONTH. THANKS

 

Have you replaces your air filter? It could be the mass air flow sensor - possibly. Try cleanig it.

 

Is it a P0401 code that your getting? You know, auto zone means well, but they should tell you that the code just sends you in the direction of the problem, not always the component that is the problem. Usually this code means that the sensor that is telling you how much flow you have, has an intermittent problem. I know people don't lilke to have to pay to fix their vehicle, but sometimes it just pays to get a professional to look at it. All that being said, you need to replace the DPFE sensor, that is a base part number 9J460.