故障现象一辆奔驰E230轿车(配置M111型发动机、W210底盘和7速自动变速器),累计行驶里程约为5万km,该车在行驶过程中踩加速踏板,或者等待红绿灯时,发动机有时会突然熄火。故障诊断接车后首先连接燃油压力表进行路试。发现当发动机出现异常熄火时,燃油压力正常,说明该故障与燃油系统无关。接着连接故障检测仪进行自诊断,发现发动机控制模块有以下故障代码储存:“010——空气流量传感器B2/5(热膜式)故障当前存在”;“036——入控制功能被解除或混合气过浓”;“067——凸轮轴转速传感器L5/5信号不 Symptom A Mercedes E230 sedan (equipped with an M111 engine, a W210 chassis and a 7-speed automatic transmission) has an accumulated mileage of about 50,000 km. When the vehicle hits the accelerator pedal while driving or waits for a traffic light, the engine sometimes abruptly Stalled. Troubleshooting After the first connection to connect the fuel pressure gauge road test. Found that when the engine abnormal shutdown, the fuel pressure is normal, indicating that the fault has nothing to do with the fuel system. Then connect the fault detector for self-diagnosis and found that the engine control module has the following fault code stored: ”010 - air flow sensor B2 / 5 (hot film type) fault present “; ”036-- into the control function Release or mixture is too thick “;” 067 - camshaft speed sensor L5 / 5 signal is not