When the EGR valve fails, you may hear knocking noises in the engine and notice reduced fuel economy from your vehicle. A buildup of carbon particles, which could clog the components, also causes them to fail over time. What happens when the valve goes bad? Here’s what you need to know about your vehicle’s EGR valve: EGR Valves Take a Lickin’ĮGR valves fail over time because of normal wear and tear since they’re in constant use. What Are the Symptoms of a Bad EGR Valve? View all 2020 Hyundai Palisade models for sale near 60606Īccording to Delphi Technologies, an auto parts and technology company, the valve is important because it regulates the flow of exhaust gases to the engine intake system, resulting in increased engine efficiency, reduced fuel consumption and lower nitrogen oxide pollutant emissions.
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