Disabling the EGR valve programmatically using the “Truck Tools” program on your vehicle

The EGR valve module consists of the EGR valve actuator with lever and the EGR valve.

The main function of the EGR valve is to control the EGR flow rate entering the intake manifold. To reduce NOx emissions, the engine recirculates exhaust gases.

The valve’s power-off and fail-safe position is controlled by a spring, which moves it to the fully closed position (0%). In the event of a malfunction, the EGR valve moves to the closed position.

In practice, disabling the EGR valve does not affect the system in any way.