P0401 Code (Symptoms, Causes, and How to Fix)

P0401 code

During the late 1970s, the automotive world underwent a series of rather monumental changes. A new found consciousness for environmental-related concerns led to a flurry of legislation aimed at curbing the output of exhaust-born pollutants.  This agenda ultimately led to the mandate of new emissions equipment, aimed at cleaning up engine exhaust. Of these components, … Read more

3 Symptoms of a Bad EGR Valve (and Replacement Cost)

bad EGR valve symptoms

The purpose of an exhaust gas recirculation (EGR) valve is to improve your vehicle’s fuel economy and performance. Not only that, but it also cuts down on emissions because it allows exhaust gasses to flow back through the cylinders to get burned again. The EGR valve even cuts down the emissions of NOx gases and … Read more