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2010 kuan xue fo lan xin jing cheng fa dong ji gu zhang deng liang
Author(s): 
Pages: 85
Year: Issue:  9
Journal: Auto Maintenance

Keyword:  发动机故障燃油系统燃油压力氧传感器控制模块故障现象故障诊断保养混合气进气道;
Abstract: <正>故障现象:2010款新景程1.8,发动机型号为2HO。客户反映两天前刚做过燃油系统深化保养,出厂后跑了没多久发动机故障灯就点亮。用诊断仪解码,发动机控制模块内有故障码:P0172,燃油调整系统浓。故障诊断:燃油系统深化保养即清洗进气道、节气门及喷油器。通常做过该保养项目发动机故障灯是不会亮的。那么,对于这台车,按照常规思路,燃油调整浓,原因大致有以下两种:①喷油过量;②进气偏少。用诊断仪查看数据流,发现短期燃油调整为-30%,长期燃油调整为64%。前者为负值,说明当前混合气比较浓,系统正在减少供油,
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