Exhaust Gas Recirculation Temperature (EGRT) Sensor
The EGRT sensor is a thermistor type sensor. The EGRT sensor is an input to the powertrain control module (PCM) and monitors the exhaust gas temperature after the EGR cooler. The electrical resistance of the sensor increases as the temperature decreases, and the resistance decreases as the temperature increases. The varying resistance changes the voltage drop across the sensor terminals and provides electrical voltage to the PCM corresponding to temperature.
The EGRT sensor is used to determine if the EGR cooler is operating correctly.