P0 12 1 How to Eliminate Fault Code P0 12 1 Troubleshooting Method

The fault code: P0 12 1 is described as follows: System scope of the fault: fuel or air applicable models: all automobile manufacturers. Throttle/pedal position sensor/switch A-circuit range/performance failure. English meaning: At present, we know nothing about P0 12 1 fault code: 1. The position and function of the accelerator/pedal position sensor on the vehicle: a) The accelerator/pedal position sensor is generally installed on the accelerator pedal. B) The function of the accelerator/pedal position sensor is to send a voltage signal reflecting the accelerator pedal position to PCM, and PCM calculates the accelerator opening according to the voltage signal to determine the fuel injection quantity. 2. The type, structural principle and influence of throttle/pedal position sensor: a) The throttle/pedal position sensor is generally three-wire system, including power line, ground line and signal line. B) The signal of the throttle/pedal position sensor is an important reference signal for controlling the fuel injection quantity of the engine. Cause and effect: 1. The fault code explains that the function of the throttle position sensor is to convert the throttle opening into an electrical signal and send it to ECM as the basis for ECM to judge the working condition of the engine. The range/performance problem of the throttle position sensor is that when the ECU receives the signal voltage exceeding the standard range from the throttle position sensor, the ECU judges it as the range/performance problem of the throttle position sensor. Suggested solution: 1. Cause of failure a) Whether the throttle valve is dirty; B) Whether the throttle position sensor and its wiring have short circuit, open circuit and poor contact; C)ECU failure. 2. Treatment method a) If this fault code appears, check whether the throttle valve is dirty; If there is dirt, please clean it up. If the fault is not solved or there are other faults, please find professional technicians. B) Failure to clean the throttle valve for a long time will lead to an error in the opening of the throttle valve, and air with impurities will enter the combustion chamber of the engine, resulting in abnormal operation of the engine. There is no strict limit on how often the throttle should be cleaned, which has a lot to do with car habits and the environment. It is usually recommended to clean every 20,000 kilometers.