Failure phenomenon of Haval h5egr valve

What should I do if the EGR valve of Haval H5 engine fails? The valve may be caused by pollution or damage controlled by the electronic control unit, and the exhaust gas recirculation valve can be replaced in the 4S factory. The exhaust gas recirculation valve opens only when the engine is under medium load, and closes at low load and high load. Exhaust gas recirculation valve is the valve of exhaust gas recirculation system. If the EGR valve fails, there will be phenomena such as extremely unstable idle speed or even flameout, flashing fault lights, annual emission failure, engine oil combustion, blue smoke from tail gas and so on. Exhaust gas recirculation valve is an electromechanical product installed on diesel engine, which is used to control the amount of exhaust gas recirculation fed back to the intake system. It is usually located on the right side of the intake manifold, near the throttle body, and connected to a short metal pipe leading to the exhaust manifold. Its function is to control the amount of exhaust gas entering the intake manifold and make a certain amount of exhaust gas flow into the intake manifold for recycling. Exhaust gas recirculation valve is a very important key component in exhaust gas recirculation device. The failure of Haval H5EGR valve will affect the normal operation of the engine, especially when the engine is idling, low speed and small load, high speed operation, rapid acceleration and deceleration, and the engine is cold. Excessive waste recovery will have a serious impact on engine performance, leading to extremely unstable idle speed or even flameout, flashing fault lights, annual emission failure, engine oil combustion, blue smoke from exhaust gas and other faults. Million car purchase subsidy