Thermistor (Temperature Sensor)
A thermistor is a resistor whose value changes with temperature, used in most car temperature sensors.
What is Thermistor (Temperature Sensor)?
NTC thermistors lower their resistance as temperature rises. They measure coolant, air, oil and fuel temperature. The control unit reads them as a voltage. A PTC thermistor increases resistance with temperature and is used for some heating elements and protection devices. Tables in workshop manuals give resistance at different temperatures.
How it works
A reference voltage passes through the thermistor and the voltage drop shows temperature.
Why it matters for your car
A shorted or open thermistor gives unrealistic temperatures. Compare readings with actual temperature.
Other terms
- CV Joint (Constant Velocity Joint)
- Diamond-Cut Alloy Wheels
- Eco-driving
- Emissions Test
- Engine Balance (Primary And Secondary)
- Engine Flush
- EU Tyre Label
- Exhaust Resonator
- GPS Navigation System
- Grab Handle
- Heated Door Mirrors
- High-pressure Fuel Pump
- Hydrogen Refuelling
- Injector Leak-off Test
- Number Plate (Licence Plate)
- Radial Tyre
- Radiator
- Three-Phase AC Charging
- Timing Chain
- Unit Injector (Pump Injector)