What Causes EGR Valve Failure?

1 Answers
VonJanelle
07/29/25 5:02pm
The reasons for EGR valve (exhaust gas recirculation valve) failure in a car are as follows: 1. Quality issues with the exhaust gas recirculation system itself; 2. Improper maintenance; 3. Problems with fuel quality; 4. Aging of the exhaust valve. The EGR valve is part of the exhaust gas recirculation system. Symptoms of a faulty EGR valve include extremely unstable idling or even stalling, flashing warning lights, failure to meet emission standards during annual inspections, burning engine oil, and blue smoke from the exhaust. When the EGR valve remains stuck open, the car may emit black smoke, experience poor acceleration, and increased fuel consumption. If the EGR valve remains stuck closed, it can affect the car's exhaust emissions, potentially causing it to fail annual inspections.
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