EGR Valve: Description and Operation

EGR Pintle Position Sensor:

The integrated electronic EGR valve functions similar to a standard EGR (ported vacuum) valve with a remote vacuum regulator, except the regulator and pintle position sensor are sealed in a black plastic cover. The regulator and position sensor are not serviceable. There is a serviceable filter that provides clean fresh air to the regulator, along side the vacuum tube. The ECM provides a variable current to control EGR operation. Inputs from the Coolant Temperature (CTS) sensor, Manifold Air Temperature (MAT) sensor, and engine speed all assist in controlling the current to the EGR valve.