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尿素少了亮什么灯
更新时间: 2021-02-10 19:39:42  

1、尿素少了亮红色灯。

2、故障现象:车内仪表故障灯频繁闪烁,故障代码显示为尿素压力过低,尿素消耗高。

3、故障分析:该车尿素箱上部外漏严重,更换过尿素箱总成、尿素泵,更换过后还是存在漏尿素溶液。检查中发现漏液位置为尿素箱通气孔。排除尿素溶液添加过多的可能,检查尿素箱水加热阀。发现水加热阀常通损坏,更换水加热阀,故障排除。

4、故障总结:尿素箱内温度过高导致尿素挥发,从通气孔排出后结晶在尿素箱周围。通气孔结晶过多导致通气孔堵塞,尿素系统工作时箱内抽真空严重,尿素建压受阻,所以报出尿素压力过低的故障。

关键词: 尿素 什么

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