Exhaust Gas Recirculation Temperature (EGRT) Sensor
WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
The EGRT bank 1, sensor 2 (EGRT12) is a thermistor device in which resistance changes with temperature. The EGRT12 sensor is an input to the PCM. 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 signals to the PCM corresponding to temperature.
The EGRT12 sensor is primarily used for EGR flow calculation and is also used for EGR cooler diagnostics. The EGRT12 sensor monitors the exhaust gas temperature downstream of the EGR cooler. The EGRT12 sensor is located between the EGR cooler and the EGR valve on the EGR orifice tube assembly.