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bao ma 745li fa dong ji gu zhang deng liang
Author(s): 
Pages: 50
Year: Issue:  3
Journal: Auto Maintenance

Abstract: 故障现象:一辆美款宝马745Li(E66)轿车,行驶了90000km,行驶中发动机故障灯点亮.  故障诊断:用GT1检测读取发动机控制模块DME中存储的故障码为:272B,混合气乘法调校,汽缸列2调校达到极限,混合气过稀.故障当前不存在.最后还给出了SAE标准的故障码为:P2179,部分负荷时混合气过稀.造成混合气过稀的常见原因有:①燃油品质差;②燃油压力过低;③喷油器开度过小;④空气流量传感器表面有脏物或损坏.……
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