故障现象一辆2012年产朗逸16L轿车,搭载CPJ发动机和09G手自一体变速器,累计行驶里程约为3.9万km。据驾驶人反映,该车发动机故障灯常亮。故障诊断起动发动机,发现组合仪表上的发动机故障灯常亮;连接VAS6150B查看网关安装列表,发现发动机电控系统存在故障(图1);进入发动机控制单元,发现存储有故障代码P0131——气缸列1传感器1电压低,静态(图2);查看发动机数据流第33组数据,发现前氧传感器的信 Fault phenomenon A 2012 Nissan Langyi 16L sedan, equipped with CPJ engine and 09G manual transmission, the cumulative mileage of about 39,000 km. According to the driver reflects the car engine fault light is always on. Troubleshooting Start the engine and find that the engine fault light on the instrument cluster is on. Connect the VAS6150B to the gateway installation list and find that the engine electronic control system is faulty (Figure 1). Enter the engine control unit and find fault code P0131 - 1 sensor 1 voltage is low, static (Figure 2); view the 33rd group of engine data flow data and found the front of the oxygen sensor letter