What are the symptoms of damaged throttle position sensor?

The throttle position sensor is a friction component and a wear component. When the sensor is broken, the following phenomena will occur: 1, which will make the car unstable at idle speed, because the sensor detects the real-time condition of the engine through two contacts, and once there is a problem, the speed will be very unstable at idle speed; 2, can't start the car, even if it is started, it will often turn off, so be sure to check the throttle position sensor when using it; 3. If you often encounter these two situations, it means that the throttle position sensor is broken, and you need to replace the sensor in time to avoid other unnecessary effects on your car.