Technician A says that other temperature sensors that operate like the ECT include transmission fluid temperature (TFT), and engine oil temperature sensors. Technician B says that all temperature sensors increase in resistance as the temperature decreases. Who is right?

Question

Quizplus · Accepted Answer

Technician A is correct because transmission fluid temperature (TFT) and engine oil temperature sensors do operate similarly to the engine coolant temperature (ECT) sensor, often using thermistor technology where their resistance changes with temperature. Technician B is incorrect because not all temperature sensors increase in resistance as temperature decreases; this is characteristic of Negative Temperature Coefficient (NTC) thermistors, but Positive Temperature Coefficient (PTC) thermistors behave oppositely, and their resistance increases as temperature increases.

Technician a Says That Other Temperature Sensors That Operate Like