Different types of sensors in a car and its functions/Rolls short description

    Different types of sensors in a car and its functions/Rolls short description

      1. Temperature sensor

  1. It is a sensor that can monitor the temperature of the engine.
  2. Thermal management is crucial for the smooth running of a vehicle. Hence, it is one of the critical sensors in a car.
  3. The sensor is also responsible for the efficient functioning of the cooling system.
  4. The sensor can also help to warn the diver if the engine is running low on coolant or if the radiator is not working correctly.


  5. 2. NOx sensor

    • The NOx sensor monitors the Oxides of Nitrogen (NOx) present in the exhaust gases.
    • There are strict laws in respect to the permissible levels of NOx emission from a vehicle.
    • Hence, the NOx sensor is essential to monitor the emission of harmful gases.
    • The sensor will relay the information to the ECU, which then makes adjustments to the air-fuel mixture to achieve the required NOx levels.

      3.  Oxygen sensor

      • As the name suggests, the oxygen or O2 sensor measures the amount of oxygen present in the exhaust gases.
      • Generally, the O2 sensor is located near the exhaust manifold and after the catalytic convertor.
      • The sensor helps determine whether the engine is burning a rich or lean air-fuel mixture.
      • A faulty oxygen sensor can cause high fuel consumption, jerkiness or a problem with idling speed.

        4. Manifold Absolute Pressure (MAP) Sensor

        1. It is a sensor that monitors the engine load.
        2. It calculates the difference between the manifold and outside pressure.
        3. The MAP sensor ensures that the engine relieves fuel based on the change in pressure.
        4. The failure of the MAP sensor may result in high fuel consumption.

          5. Throttle position sensor

          1. It measures the position of the throttle valve when you press the accelerator pedal.
          2. The sensor sends the information to the ECU, which then decides how much air-fuel mixture needs to be sent to the cylinder.
          3. A faulty throttle position sensor hampers the power delivery.

            6. Voltage sensor

            1. The voltage sensor is responsible for managing the vehicle’s idling speed.
            2. The sensor also ensures that idling speed is decreased or increased when required.

              7. Speed sensor

              1. As the name suggests, it monitors the speed of the car’s wheels.
              2. A car’s wheels can travel at different speeds when going around a corner or while off-roading.
              3. Hence, the speed sensor helps to track the speed of each wheel.
              4. The data is sent to the ECU, and it can be utilised by safety features such as traction control, ABS (Anti-Lock Braking System).
              5. The speed sensor is crucial, especially for 4×4 vehicles.

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