P0119 OBD-II: 发动机冷却液温度传感器1电路间歇性 OBD-II故障代码P0119是什么意思？
OBD-II代码P0119被定义为发动机冷却液温度电路间歇性故障。
什么意思？
发动机冷却液温度传感器测量发动机冷却液温度的上升和下降。 这为动力总成控制模块（PCM）控制空燃比、点火正时、冷却风扇和排放控制系统的许多组件提供了所需的关键数据。 发动机冷却液温度传感器将冷却液温度转换成电压，该电压可用于测量发动机冷却液温度。当发动机冷车时为高位，发动机热车时为低位。
代码 P0119 表示从冷却液温度电路到 PCM 的间歇性电压输入。
See_also: U0126 OBD II代码：与SAS模块失去通信 有此故障代码的车辆应送至修理厂进行诊断。 查找修理厂
P0119 症状
- 发动机检查指示灯点亮
- 在许多情况下，可能不会发现异常症状
- 在某些情况下，发动机可能难以启动和/或燃油经济性差
引发P0119代码的常见问题
- 发动机冷却液温度传感器故障
- 发动机冷却液生锈和/或腐蚀
- 冷却系统堵塞或受限
- 发动机冷却液温度接线或连接故障或腐蚀
常见误诊
- 更换发动机冷却液温度传感器，而真正原因是冷却液生锈
- 更换发动机冷却液温度传感器，但真正原因是连接不良或接线皴裂。
- 当真正的问题出在冷却风扇或冷却系统时，更换发动机冷却液温度传感器。
排放的污染气体
- HCs（碳氢化合物）：未燃烧的原燃料液滴，有异味，影响呼吸，导致烟雾。
- CO（一氧化碳）：部分燃烧的燃料，是一种无味的致命有毒气体。
- NOX（氮氧化物）：在阳光照射下导致烟雾的两种成分之一。
P0119 车间和技术人员诊断理论
在诊断 P0119 代码时，重要的是记录冻结帧信息，然后通过试车重复代码设置条件，同时密切注意数据流扫描工具上的发动机负荷、节气门位置、转速和路速。 在驾驶车辆时，将这些值与冷却液温度传感器 PID 或参数 ID 进行比较。 冷却液温度传感器发动机冷却液温度或ECT读数与进气温度传感器的读数相比较，因为它们应该相互同步移动。 但是，发动机冷却液温度传感器的温度范围要高得多。
See_also: P061A OBD II故障代码 在钥匙打开、发动机关闭的情况下检查ECT传感器连接器。 需要有稳定的5伏参考电压和良好的接地。 查找并使用正确的发动机性能接线图来辨别连接器中这些导线的正确颜色和位置。
对ECT传感器进行钥匙接通发动机熄火电压输出测试永远不会有坏处。 通常，我会小心地使用热风枪提高传感器周围区域的温度，并研究冷却液温度传感器电路的数值变化。 使用扫描工具数据流很重要，因为这将验证ECT线束和连接。
Ronald Thomas
Jeremy Cruz is a highly experienced automotive enthusiast and a prolific writer in the field of auto repair and maintenance. With a passion for cars that dates back to his childhood days, Jeremy has devoted his career to sharing his knowledge and expertise with consumers who seek reliable and accurate information about keeping their vehicles running smoothly.As a trusted authority in the automotive industry, Jeremy has worked closely with leading manufacturers, mechanics, and industry experts to gather the most up-to-date and comprehensive knowledge in auto repair and maintenance. His expertise extends to a wide range of topics, including engine diagnostics, routine maintenance, troubleshooting, and performance enhancement.Throughout his writing career, Jeremy has consistently provided consumers with practical tips, step-by-step guides, and trusted advice on all aspects of auto repair and maintenance. His informative and engaging content allows readers to understand complex mechanical concepts easily and empowers them to take control of their vehicle's well-being.Beyond his writing skills, Jeremy's genuine love for automobiles and innate curiosity have driven him to constantly stay abreast of emerging trends, technological advancements, and industry developments. His dedication to informing and educating consumers has been recognized by loyal readers and professionalsalike.When Jeremy isn't immersed in automobiles, he can be found exploring scenic driving routes, attending car shows and industry events, or tinkering with his own collection of classic cars in his garage. His commitment to his craft is fueled by his desire to help consumers make informed decisions about their vehicles and ensure they have a smooth and enjoyable driving experience.As the proud author of the blog for the leading provider of auto repair and maintenance information to consumers, Jeremy Cruz continues to be a reliable source of knowledge and guidance for car enthusiasts and everyday drivers alike, making the road a safer and more accessible place for all.
