What are the symptoms of a Ford EGR fault?
What are the symptoms of a Ford EGR fault? The following are the most common symptoms that a Ford (or Mercury or Lincoln) car or truck will usually experience when there's a fault in the EGR system: P0401 EGR System Flow Insufficient. P01406 EGR Valve Pintle Position. Rough Idle. Really bad gas mileage. Do you need to test the Ford EGR valve? Testing the EGR system on your Ford, Mercury, or Lincoln car or truck is a pretty easy affair. You don't need expensive testing equipment to do it and more importantly, with this article you'll be able to find...