1. Throttle position sensor?

Function: The throttle position sensor monitors the opening angle of the throttle and determines the idle speed, full load and acceleration and deceleration conditions to implement the Various fuel injection quantity controls corresponding to the throttle opening status

. Effect of failure: idle speed fluctuates high and low, or causes speeding. ?

2. Intake valve pressure sensor?

Function: The intake pressure sensor provides engine load information, which is the pressure of the intake pipe through

Measurement, indirectly measuring the intake air volume entering the engine, and then converting the intake air volume into an electrical signal through the internal circuit and providing it to the computer. Effect of failure: causing the engine to be difficult to start or idling unstable. ?

3. Intake air temperature sensor?

Function: Provide air temperature information for correcting fuel injection quantity and ignition timing. ?Failure effects: The idle speed is low and it is easy to stall. ?

4. Crankshaft angle sensor?

Function: It provides speed and crankshaft phase information, and provides a reference point for injection timing and ignition timing. Effect of failure: The engine cannot start or the engine suddenly stalls after starting. ?

5. Coolant temperature sensor?

Function: It monitors the engine coolant temperature, converts it into a voltage signal and sends it to the computer. The ECU controls the amount of fuel injection based on this signal. , ignition timing and idle speed control. ?Failure impact: The idle speed is low. ?

6. Oxygen sensor?

Function: It provides mixer concentration information, which is used to correct the fuel injection amount, achieve closed-loop control of the air-fuel ratio, and ensure the actual air-fuel ratio of the engine. The main component close to the theoretical air-fuel ratio. ?Effects of failure: unstable idle speed and excessive consumption. ?

7. Knock sensor?

Function: It provides knock information, which is used to correct the ignition timing and implement closed-loop control of detonation. ?Failure impact: When knocking is about to occur, the knock signal point cannot be provided. The computer cannot receive the signal "peak" and cannot reduce the ignition advance angle, so knocking occurs. ?

8. Three-way catalytic converter?

Function: The three-way catalytic converter is installed in front of the muffler in the exhaust pipe, which can simultaneously reduce three pollutants (carbon monoxide, CO , the content of unburned carbon and oxygen compounds HC and oxides Nox. When the air-fuel ratio of the engine is close to the theoretical air-fuel ratio, the conversion efficiency of the three-way catalytic converter is the highest. When the high temperature of 300°C to 800°C of harmful gases passes through the center of the three-way catalytic converter. The precious catalysis attached to the ceramic monomer undergoes oxidation and reduction reactions and is converted into harmless gases. Effect of failure: The exhaust gas cannot meet the standards.