故障现象一辆帕萨特B5车,发动机型号为AWL,行驶里程约为27.8万km,因发动机油耗大、加速缓慢而进厂检修。据驾驶人反映,该车发动机不久前曾因发动机动力不足而进行了大修。故障诊断接车后试车验证故障,故障确实存在。连接故障检测仪,读取故障代码,调得的故障代码为“16396P0012 A凸轮轴位置(气缸列1)正时过度滞后静态”(图1)。分析该故障代码产生的原因如下。 Fault phenomenon A Passat B5 car, engine model AWL, mileage of about 278,000 km, due to large engine fuel consumption, slow speed into the plant overhaul. According to the driver, the engine of the car was overhaul not long ago due to insufficient engine power. Troubleshooting After the test car to verify the fault, the fault does exist. Connect the fault detector, read the fault code, and adjust the fault code to “16396P0012 A camshaft position (cylinder bank 1) timing over-lag static” (Figure 1). The reason for analyzing this trouble code is as follows.