How to deal with p0 123 fault code?

After the automobile fault is eliminated, it is generally necessary to clear the fault code. When clearing the code, it should be carried out in strict accordance with the fault code clearing method specified for a specific vehicle model, and pay attention to the fact that the battery negative ground wire can not be removed casually to clear the fault code.

P0 123 fault code is applicable to all automobile manufacturers, indicating that the throttle/pedal position sensor/switch A circuit is high. In the Electronic Throttle Control (ETC) system, the function of the accelerator pedal position (APP) sensor is to transmit the position of the accelerator pedal to the throttle control module in the form of an electrical signal, which serves as a reference for the throttle actuator to control the throttle opening. This fault code indicates that the signal voltage of electronic accelerator pedal position sensor A is higher than the calibrated maximum value (4.65v). The fault causes include the short circuit of the sensor signal circuit to the positive electrode, the fault of the sensor itself or the fault of the electronic control module (PCM or ECM).

After troubleshooting a car, it is usually necessary to clear the fault code. When clearing the code, it should be carried out in strict accordance with the fault code clearing method specified for a specific vehicle model, and pay attention to the fact that the battery negative ground wire can not be removed casually to clear the fault code. Otherwise, it may cause trouble in the following two aspects: First, it may cause the control center computer of some models to lose normal records. We know that the control computer of some models has the function of automatic memory. After the negative grounding wire of the battery is removed, it will automatically erase the experience data of the engine operation stored in the random access memory (RAM), which will lead to the car's normal performance for a long time after maintenance, or the cleared fault code will reappear after driving for a period of time. Secondly, sometimes some useful functions will fail, such as audio locking function is one of the very common situations. At this time, it is necessary to decrypt the audio system according to more complicated procedures to restore the normal work of the audio system.

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