![]() ![]() #4 – Verify EGR Temperature Sensor Operation.#3 – Check For Sufficient Vacuum/Voltage.#2 – Inspect EGR Wiring and Vacuum Lines.Read on to learn more about diagnostic trouble Code P0401, as well as how to diagnose and remedy such issues should they arise. However, perhaps no such issue is as common as that related to diagnostic trouble code P0401. ![]() While today’s EGR valves tend to be relatively well designed, virtually any engine is still prone to the occasional EGR-related issue. This valve reroutes exhaust gates into an engine’s intake tract, as specified by the vehicle’s PCM/ECM. Of these components, few are as well known as the exhaust gas recirculation (EGR) valve. This agenda ultimately led to the mandate of new emissions equipment, aimed at cleaning up engine exhaust. Looking for a good online repair manual? Click Here for the 5 best options. A new found consciousness for environmental-related concerns led to a flurry of legislation aimed at curbing the output of exhaust-born pollutants. During the late 1970s, the automotive world underwent a series of rather monumental changes. ![]()
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