The exhaust gas recirculation valve within your vehicle is a crucial component in reducing harmful emissions and ensuring your vehicle runs smoothly. Electronic EGR valves are used in vehicles dated 1990 and up. The vehicle computer operates the valve instead of previous years EGR valves, which are operated by the engine vacuum. The procedure to test an electronic EGR is a bit different and requires a multimeter.
If you notice your vehicle running poorly, stalling or having poor gas mileage, you should test the EGR. High volts could mean there is a blockage somewhere within the EGR valve and no voltage could signal a problem with the valve and computer communication.
Turn the vehicle off and remove the key from the ignition. Allow the EGR valve ample time to cool down.