What are the symptoms of a faulty EGR valve in a diesel vehicle?

[McJune]

EGR valve failure can affect the normal operation of the engine and impact vehicle performance. Symptoms may include unstable idling or stalling at idle, flashing warning lights, oil burning, reduced power, and black smoke from the exhaust pipe. Below is relevant information about the EGR valve: 1. The EGR valve (Exhaust Gas Recirculation valve) is a mechatronic component 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 is connected to the exhaust manifold via a short metal pipe. 2. Its function is to regulate the amount of exhaust gas entering the intake manifold, allowing a controlled quantity of exhaust gas to be recirculated into the intake system.