What are the causes of EGR valve failure?

1 Answers
VanCaroline
07/29/25 9:48pm
egr valve failure causes are: 1. Quality issues with the exhaust gas recirculation system itself; 2. Improper maintenance; 3. Fuel quality problems; 4. Aging of the waste valve. The function of the exhaust valve is to appropriately reduce fuel consumption, improve engine efficiency, lower exhaust temperature, and reduce the formation of nitrogen oxides and carbon monoxide. Symptoms of a faulty EGR valve include: 1. Difficulty starting the engine and weak acceleration; 2. Failure to meet annual emission inspection standards; 3. Black smoke from the vehicle's exhaust pipe; 4. Unstable idle or stalling at idle; 5. Flashing check engine light; 6. Engine oil burning; 7. Increased fuel consumption.
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