What is the reason of Qi Jun engine signal 1?

Fault description: After the vehicle is started, the engine fault light comes on. The engine fault light is on, which may be caused by the following reasons: high-pressure oil pump fault, throttle carbon deposit, oxygen sensor fault, and engine computer program needs to be upgraded.

Description and explanation of vehicle start-up fault

The high-pressure oil pump fault maintenance technician reads the data flow of the high-pressure oil pump with a special diagnostic computer for automobiles, removes the high-pressure oil pump, and detects whether the pressure value of the high-pressure oil pump is within the normal range with a fuel pressure gauge, thus confirming the fault.

If the pressure value of the high-pressure oil pump is not within the normal range, the fuel injection quantity of the engine will be too little or too much, which will cause the engine to fail to work normally, and then the high-pressure oil pump will be replaced when the engine fault light is on. During the warranty period, the 4S shop will be replaced free of charge; If the warranty period is exceeded, the cost of replacing the high-pressure oil pump in the 4S shop is about 2,000 to 3,000 yuan.

The man-hour cost is about 300 grass 500 yuan, and the cost of replacing the high-pressure oil pump in the repair shop is about 2000 yuan. Working hours are around 300 yuan. The carbon deposit maintenance technician opens the engine cover, removes the air inlet hose and throttle, and observes whether there is carbon deposit on the throttle surface. If there is carbon deposit on the throttle, it will cause the throttle plate to get stuck, which will lead to abnormal air intake of the engine.