Fault code P 127 1

1. Fault code applicable models: GM, Buick, Chevrolet, Cadillac, Hummer, Jinbei. Fault code: P 127 1 Chinese meaning: accelerator pedal position sensor 1/2- signal correlation English meaning: accelerator pedal position sensor 1/2-. Detailed meaning: 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 electrical signals, which can be used as a reference for the throttle actuator to control the throttle. 2. Fault codes are applicable to the following vehicles: Ford, Mercury and Lincoln. Fault code: P 127 1 Chinese meaning: 1 cylinder injector circuit. English meaning: 1 cylinder injector circuit-positive short circuit category: powertrain system (from the manufacturer's own meaning) Detailed meaning: The function of the injector is to atomize the fuel to meet the requirements of combustion. The working principle is that when the electromagnetic coil is energized, the suction force is generated, the needle valve is sucked up, the nozzle hole is opened, and the fuel is ejected at a high speed through the annular gap between the needle and the nozzle hole in the axial direction of the needle valve head, forming a mist. The ECU controls the fuel injection quantity by controlling the opening time interval (also called pulse width) of the fuel injector. 3. Fault codes are applicable to the following vehicles: Nissan, finidi and UK. Fault code: P 127 1 Chinese meaning: heated oxygen sensor-low voltage (1No.) English meaning: heated oxygen sensor-low voltage (1No./sensor) Details. Therefore, in the OBD fault code, we often see the statement of which oxygen sensor is located in which row. 1 line refers to the line where 1 cylinder is located, and the remaining lines are 2 lines. No matter which row, the first sensor always refers to the upstream oxygen sensor (in front of the catalytic box), and the second sensor always refers to the downstream oxygen sensor (behind the catalytic box). 4. Fault code applicable vehicle models: Audi and Volkswagen. Fault code: P 127 1 Chinese meaning: Fuel injector failed to reach control limit -4 cylinders English meaning: Fuel injector failed to reach control limit -4 cylinders Category: Power system (from the manufacturer's own meaning) Detailed meaning: The function of fuel injector is to atomize fuel to meet the requirements of combustion. The working principle is that when the electromagnetic coil is energized, the suction force is generated, the needle valve is sucked up, the nozzle hole is opened, and the fuel is ejected at a high speed through the annular gap between the needle and the nozzle hole in the axial direction of the needle valve head, forming a mist. The ECU controls the fuel injection quantity by controlling the opening time interval (also called pulse width) of the fuel injector. 5. Fault code applicable vehicle type: Isuzu fault code: P 127 1 Chinese meaning: accelerator pedal position (APP) sensor 1/2- signal change English meaning: accelerator pedal position sensor 1/2- signal change category: power system (meaning from manufacturer) details.