Why is the Volkswagen Passat sensor broken?

The fault of Volkswagen Passat sensor may be a mechanical fault, or it may be a fault caused by burnt line. Vehicles have various sensors with different functions, different installation positions and different failure frequencies and causes; If the sensor is not replaced in time, it will affect the driving safety. The types and functions of sensors are as follows:

1. Intake pressure sensor: it reflects the change of absolute pressure in the intake manifold and provides a reference signal for ECU (Engine Electronic Control Unit) to calculate the fuel injection duration;

2. Throttle position sensor: measures the throttle opening and provides it to ECU as a reference signal for fuel cut-off, air-fuel ratio control and ignition advance angle correction;

3. Air temperature sensor: detects the intake air temperature and provides it to ECU to calculate the air density; Coolant temperature sensor: detects the temperature of coolant and provides engine temperature information to ECU;

4. Crankshaft position sensor: detects the rotating speed of crankshaft and engine, and provides it to ECU as reference signal to determine ignition timing and working sequence;

5. Oxygen sensor: detect the oxygen concentration in the exhaust gas and provide it to ECU as a reference signal to control the air-fuel ratio near the optimal value (theoretical value); Knock sensor: installed on the cylinder block to detect the knock of the engine and provide it to ECU to adjust the ignition advance angle according to the signal.

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