What is Engine Sensors?

What is Engine Sensors?

A modern car’s Engine Management System consists of various electronic and electrical components. Moreover, these comprise engine sensors, relays, and actuators. They provide the car’s Engine Control Unit with vital data parameters essential to govern various engine functions effectively.

Engine sensors are elector-mechanical devices that monitor various engine parameters. An engine uses different types of sensors such as Thermocouples, Resistance Temperature Detectors (RTDs), and Hall Effect sensors.

A Modern-day Car Has The Following Sensors:

SL. Name of the Sensor Purpose
01 Air- fuel Ratio meter It monitors the correct air-fuel ratio for the engine
02 Engine Speed Sensor It monitors engine speed
03 Throttle Position Sensor Further, it monitors the position of the throttle  in an engine
04 Crank position sensor Monitors piston’s TDC position in the engine
05 Cam Position Sensor Further, it monitors the position of valves in the engine
06 Knock Sensor Detects engine knocking because of timing advance
07 Engine coolant temperature sensor Moreover, it measures the engine temperature
08 Manifold Absolute Pressure or MAP Sensor Used to regulate fuel metering
09 Mass Air Flow or MAF Sensor Further, it notifies the mass of air entering the engine to ECU
10 Oxygen/02/lambda sensor It monitors the amount of oxygen in the exhaust
11 Fuel Pressure Sensor Additionally, it measures pressure in the fuel system
12 Vehicle Speed Sensor (VSS) Measures the speed of a vehicle

Furthermore, the Electronic control Unit  sends signals to various relays and actuators after calculating the fuel quantity. They include the ignition Circuit   Spark Plugs, Fuel Injectors   Engine Idling Air Control valve, and Exhaust Gas Re-circulation  (EGR) valve. Thus, it extracts the best possible engine performance while keeping emissions as low as possible.

Since all the engine sensors connect to the ECU, it can also monitor them for malfunction. Besides, the ECU collects signals from faulty engine sensors. Then again, the ECU stores them in its memory. So, you can diagnose these faults through two methods. Firstly, by reading the ECU memory with the help of ‘fault codes.’ Or diagnostic with any available car scanner or blou tooth device like ELM 327 or other

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