该车匹配了2.2L直列4缸发动机、自动变速器,行驶里程达65万多km。设有OBD-Ⅱ型随车自诊断系统,EFI燃油喷射系统。 该佳美车每行驶320km左右发动机故障指示灯即会亮,并产生故障码P0446。 故障码P0446的定义是碳罐通气功能故障。技工们采用换件法,更换了几乎所有相关零件,均不能排除这一故障。更换过的零件有:2件除污碳罐、所有真空开关阀、安装在除污碳罐上的压力传感 The car matches the 2.2L inline 4-cylinder engine, automatic transmission, mileage of more than 650,000 km. With OBD-Ⅱ-based self-diagnostic system, EFI fuel injection system. The car every 320km driving the engine fault indicator light will be lit, and produce fault code P0446. Fault code P0446 is defined as the canister ventilation function failure. Technicians who use the method of change, replacement of almost all the relevant parts, can not rule out the fault. Replacement of the parts are: 2 decontamination canister, all vacuum switch valve, mounted on the decontamination tank pressure sensor