故障现象一辆行驶里程约为7.3万km的2013款凯迪拉克XTS车,发动机故障灯点亮,仪表提示“前照灯故障”。故障诊断接车后,首先确认故障现象,车主反映的故障现象确实存在,仪表盘上的发动机故障灯点亮,且仪表提示“前照灯故障”。使故障检测仪读取故障代码,结果如图1所示。将故障代码清除后,发动机故障灯熄灭,但经过多次起动试车,发动机故障灯又点亮了,在发动机故障灯点亮后再次读取故障代码,结果如图2所示。再 Trouble phenomenon A mileage of about 73,000 km of the 2013 Cadillac XTS car, the engine fault light lit, the instrument prompts “headlight failure ”. Fault diagnosis After the car, the first to confirm the fault phenomenon, the owners reflect the phenomenon of failure does exist, the dashboard engine fault light is lit, and the instrument prompts “headlamp fault ”. Fault detector to read the fault code, the results shown in Figure 1. After the fault code is cleared, the engine fault light goes off, but after several starts and tests, the engine fault light is lit again and the fault code is read again after the engine fault light is on. The result is shown in FIG. 2. again