Passat sensor is broken. What are the symptoms?

Different sensors have different functions and different damage symptoms. The symptoms of Passat sensor failure are as follows: 1. Symptoms of damaged speed sensor: the engine is unstable at idle speed; When the vehicle slows down and starts or stops while driving, there is an instant stop or flameout phenomenon; Engine acceleration performance decreases; There is a deviation in the speed display on the instrument; Engine failure ...

Passat sensor is broken. What are the symptoms?

Different sensors have different functions and different damage symptoms. Symptoms of Passat sensor failure are as follows:

1. Symptoms of damaged speed sensor: the engine is unstable at idle speed; When the vehicle slows down and starts or stops while driving, there is an instant stop or flameout phenomenon; Engine acceleration performance decreases; There is a deviation in the speed display on the instrument; Engine fault light is on;

2. The failure of the throttle position sensor indicates that if the throttle position sensor fails, the correct ignition advance angle and air-fuel ratio cannot be guaranteed. The throttle position sensor should be accurately adjusted to the specified voltage reading. If the adjustment is too low, the exhaust gas recirculation system will knock when accelerating because it does not provide enough exhaust gas in time. If the regulation is too high, the exhaust gas recirculation system will provide too much exhaust gas, thus reducing the power.

3. Description of coolant temperature sensor damage: If the coolant temperature sensor fails, the engine will have unstable idle speed, fire, flameout or increased fuel consumption. According to the manufacturer's regulations, the resistance value of the coolant sensor at different working temperatures should be tested with a multimeter. There is a body height sensor at the suspension, and the body height will be different due to different load conditions. According to the change of body height, the height of headlights will be adjusted automatically.

The effect of sensor damage is different because of the different functions of the sensor.

What will happen to the dashboard if the Passat sensor is broken?

The sensor needs a new one. Passat sensor is broken, and it is still on after replacement. You need a new sensor. There are many kinds of sensors in the car, with different functions, different installation positions and different failure frequencies and reasons. 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 of intake manifold and provides reference signal for ecu (Engine Electronic Control Unit) to calculate 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 engine knock and provide it to ecu to adjust the ignition advance angle according to the signal.

Just get a new sensor. Passat sensor is broken. What are the symptoms? What happens to the dashboard when Passat sensor is broken @20 19