This exhaust system temperature sensor monitors the gas temperature in the exhaust stream downstream of the diesel oxidation catalyst or diesel particulate filter. It sends a resistance signal to the engine control unit, which uses the reading to manage regeneration cycles and injection timing. A failed sensor can cause the system to enter a derated power mode or prevent active regeneration from initiating, leading to filter clogging. As an original AGCO component, the sensor's thermistor curve matches the ECU calibration, so no software adjustment is needed on installation. When replacing, apply anti-seize compound to the threads and torque the sensor to the housing specification.