The EGR transducer is responsible for controlling the flow of exhaust gases back into the intake manifold in order to reduce emissions. It does this by opening and closing the EGR valve based on signals received from the engine control unit (ECU). If the transducer is not operating properly, it can cause the EGR valve to malfunction, which can lead to increased emissions and other performance issues.
To test the EGR transducer, you can apply a vacuum to the transducer and see if it holds. If it does not, it is likely defective and should be replaced.
