Fault code P 1239

Fault code applies to vehicle type 1: mini fault code: P 1239 Category: Power system (provided by the manufacturer) Details: The manifold absolute pressure (MAP) sensor is used to measure the pressure (vacuum degree) in the intake manifold. Then, the powertrain control module (PCM) will determine the basic fuel injection quantity of the injector according to the difference between the intake manifold pressure and the atmospheric pressure (which is linear with the engine load), thus helping the engine to achieve the best air-fuel ratio under different loads. Reasons include: manifold absolute pressure sensor 2- signal is too low when the engine is stopped. The fault code applies to model 2: Nissan, finidi, UK. Fault code: P 1239 category: power system (meaning of the manufacturer). Detailed meaning: In the electronic throttle (ETC) system, the electronic control module (ECU) is based on the accelerator pedal position (APP) sensor, engine speed, vehicle speed, air conditioning energy consumption and other signals. The throttle actuator is a stepping motor, which is responsible for controlling the throttle opening according to the instruction of the throttle control module. The throttle position (TP) sensor is used to send the throttle opening to the electronic control unit (ECU) in the form of electrical signal, which is one of the basic parameters for controlling the fuel injection of the engine. The reasons include: throttle position-performance (2nd row) fault code applicable to model 3: Audi, Volkswagen fault code: P 1239 Category: powertrain 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. Reasons include: fuel injector circuit cylinder opening 3 fault code applicable to vehicle type 4: Chrysler, Dodge, Jeep fault code: P 1239 Category: powertrain system (from the manufacturer's own meaning) Details: EOT sensor transmits oil temperature to electronic control unit (ECU) in the form of electrical signal according to the principle of thermistor. Reasons include: engine oil temperature-low temperature fault code applicable to vehicle model 5: Mitsubishi and Changfeng fault code: P 1239 Category: powertrain system (from the manufacturer's own meaning) Detailed meaning: The function of crankshaft is to convert the up-and-down motion of piston into rotary motion. Crankshaft position (CKP) sensor (also called TDC sensor) is used to detect TDC signal, crank angle signal and engine speed signal, and input them into the computer, so that the computer can issue the best ignition timing instruction according to the ignition sequence of cylinders. The reasons include: CKP sensor-range/performance fault code applicable to model 6: GM, Buick, Chevrolet, Cadillac, Hummer, Jinbei fault code: P 1239 Category: powertrain system (from the manufacturer's own meaning) Detailed meaning: The function of the fuel 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. Causes include: Fuel Injector 6 circuit failure.