The EGR valve receives a duty cycle signal from the PCM and sends a variable voltage signal from the Exhaust Gas Recirculation Valve Position (EGRVP) sensor back to the PCM to indicate actual position. Internally, it has two valves connected by a common shaft. Exhaust gases are routed from the right exhaust manifold to the center of the valve.
When the valve is opened, exhaust gases flow out the top and bottom poppet valves either through the EGR Cooler and to the intake manifold or directly to the intake manifold if the EGR cooler bypass valve is in bypass position.