What does it mean that the throttle position sensor 1-2 is unreasonable?

The unreasonable position of sensor 1-2 is generally caused by the throttle. If the original throttle is replaced, it is recommended to check whether the plug line from the vehicle throttle plug to the engine computer is damaged. Check the signal voltage of throttle position sensor with computer. In this case, the throttle valve can be cleaned first and then reset. If it really doesn't work, you have to replace the throttle. The function of the throttle position sensor is as follows: 1. Detection condition: The throttle position sensor, also known as throttle opening sensor or throttle switch, is mainly used to detect whether the engine is in idle condition or load condition, acceleration condition or deceleration condition. It is essentially a variable resistor and several switches installed on the throttle body. 2. Two contacts: the rotating shaft of the resistor is connected with the throttle valve. It has two contacts: a fully open contact and an idle contact. When the throttle valve is in the idle position, the idle contact is closed and the idle working condition signal is output to the computer; When the throttle is in other positions, the idle contact opens to output voltage signals at different angles relative to the throttle, and the computer will identify the engine load according to the signal voltage value; According to the change rate of signal voltage in a certain period of time, whether it is an acceleration state or a deceleration state is identified. The computer corrects the fuel injection quantity or controls the fuel cut-off according to these working conditions.