故障现象一辆2008年四川一汽丰田考斯特车(采用N04C高压共轨柴油发动机),累计行驶里程约为28万km,出现发动机加速无力,最高车速只能达到30km/h的现象。故障诊断经过了解得知,该车曾因上述故障在其他维修站进行过维修,但未能找到故障原因,于是车主以30km/h的车速行驶近10h才开到我厂寻求帮助。接车后试车,验证故障现象。起动发动机,发动机故障灯点亮。连接DST-Ⅱ查看ECU内存储的故障代码,为P0192——燃油压力传感器电路低输入。接着分析冻结帧数据,发现故障代码是发动机在怠速工况、暖机过程中,燃油压 Symptom A 2008 Sichuan FAW Toyota COAST car (using N04C high-pressure common rail diesel engine), the cumulative mileage of about 280,000 km, there engine weakness, the maximum speed can only reach 30km / h phenomenon. Fault diagnosis Knowing that the car had been repaired at other repair stations due to the above fault but failed to find the cause of the fault, so the owner of the vehicle traveling at a speed of 30km / h for nearly 10h only drove to our factory for help. Take the car after the test, verify the symptoms. Start the engine, the engine fault light is on. Connect DST-Ⅱ to check the fault code stored in ECU for P0192 - low input of fuel pressure sensor circuit. Then analyze the freeze frame data and found that the fault code is the engine idling conditions, warm-up process, the fuel pressure