What is the function of engine sensors?

[OJackson]

Engine sensors have the following functions: 1. Air flow sensor: Measures the amount of air entering the engine and is installed on the air bypass channel; 2. Intake pressure sensor: Detects changes in the negative pressure of the intake manifold to determine the engine's air intake volume; 3. Engine speed and camshaft position sensor: Used to measure engine speed and confirm the crankshaft position signal; 4. Throttle position sensor: Includes a linear throttle potentiometer and an idle switch. The former provides the ECU with data to control fuel injection volume and ignition timing, while the latter informs the ECU when the throttle is in the idle state; 5. Coolant temperature sensor: Measures the temperature of the engine coolant; 6. Intake temperature sensor: During engine operation, the mass of air entering the engine is related to the intake temperature and atmospheric pressure. When the intake temperature is low, the air density is higher, resulting in a greater mass for the same volume of gas. Conversely, when the intake temperature is high, the mass of the same volume of gas is smaller; 7. Knock sensor: Detects whether the engine has a knocking phenomenon; 8. Oxygen sensor: Measures the oxygen content in the exhaust gas; 9. Vehicle speed sensor: Measures the vehicle's driving speed.

[RosalieMarie]

Engine sensors are like the eyes and ears of a car, helping me monitor the engine's various conditions in real time while driving. They detect temperature, oil pressure, air flow, exhaust composition, and more, then send the data to the computer unit so it can decide how much fuel to inject and when to ignite. This ensures the car runs smoothly, is fuel-efficient, eco-friendly, and meets emission standards. If a sensor fails, big problems can arise: for example, a faulty oxygen sensor may cause excessive exhaust emissions and skyrocketing fuel consumption; a malfunctioning temperature sensor can lead to engine overheating and smoke, damaging the car and posing risks. While driving, pay attention—if a dashboard warning light comes on, get it fixed promptly to prevent minor issues from escalating. Sensor maintenance is also simple—just regular check-ups. This way, the car lasts longer and drives more comfortably.

[OXavier]

With over 20 years of driving experience, I find engine sensors absolutely crucial. They monitor fundamental data like crankshaft position, camshaft angle, and speed, enabling the control module to make precise adjustments. For instance, oxygen sensors handle exhaust emissions, temperature sensors prevent overheating, and air flow sensors regulate fuel injection. If a sensor fails, the car starts acting up: unstable idling, sluggish acceleration, or increased fuel consumption. Common issues include poor wiring connections or carbon buildup causing inaccurate readings, which require diagnostic tools to identify. Prompt replacement of faulty parts solves the problem. These components make vehicles smarter and more efficient while extending engine life. Developing good habits—like checking sensor conditions during every maintenance service—can save significant repair costs.

[DiValerie]

From a technical perspective, engine sensors play multiple roles. I'm passionate about understanding various types: oxygen sensors monitor emissions; crankshaft position sensors determine speed and ignition timing; intake air temperature sensors adjust air density; knock sensors prevent detonation damage. Their data is used by the engine computer to optimize fuel injection and combustion processes in real-time, enhancing performance and efficiency. Sensor failure can trigger warning lights, affect fuel consumption, or cause abnormal driving conditions. Regular maintenance can prevent such issues.

[McBenjamin]

As a homemaker using the car, sensors give me peace of mind. They monitor engine operation, like temperature sensing to prevent overheating, pressure detection to ensure lubrication, and oxygen measurement to control pollution. This ensures the car's reliability and safety, giving me confidence whether picking up the kids or going on long trips. Sensor issues like incorrect readings can cause unexpected failures, so when the light comes on, it's time to check. Simple daily maintenance, such as keeping them clean and adopting proper driving habits, can extend sensor lifespan. In short, they are silent guardians.