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What are the causes of EGR valve failure?

1 Answers

DelHaley

07/30/25 4:41am

EGR valve failure causes: 1. Quality issues with the exhaust gas recirculation system itself; 2. Improper maintenance; 3. Fuel quality problems; 4. Aging of the waste valve; 5. The car being accidentally filled with low-purity gasoline or fuel additives can cause sudden EGR valve damage. The EGR valve is part of the exhaust gas recirculation system. A faulty EGR valve can lead to extremely unstable idling or even stalling, flashing check engine light, failure to meet emission standards during annual inspections, burning engine oil, and blue smoke from the exhaust. The EGR valve is a mechatronic product installed on diesel engines to control the amount of exhaust gas recirculated back into the intake system. It is typically located on the right side of the intake manifold, near the throttle body, and connected to the exhaust manifold via a short metal pipe. The function of the EGR valve is to regulate the amount of exhaust gas entering the intake manifold, allowing a certain amount of exhaust gas to flow into the intake manifold for recirculation.

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