If your Service Engine Soon light is on continuously, and a scan shows OBD code 401 - EGR Flow Insufficient, the trouble may be caused by carbon buildup in the EGR tube. If the trouble can’t be traced to any of the easier-to-get-at parts (e.g., EGR valve, Throttle Body ports, etc.), and there IS carbon buildup in the EGR tube but you can’t adequately clean it out, then get a new tube.Dorman products are reliable and fairly priced --- even with the additional cost of 2-day shipping , this purchase was more than $9 under what the auto parts stores charge for the identical product. And, AutoPartsWAY got it to me in just 1 day.BTW, I rated this at 4-stars because it’s part of a car’s emission control system, which I can’t love. The product itself is excellent.