P0717 OBD-II：输入/涡轮转速传感器 "A "电路无信号 OBD-II故障代码P0717是什么意思？
OBD-II代码P0717定义为输入/涡轮转速传感器电路无信号。
See_also: P0A7F OBD II故障代码：混合动力蓄电池组老化 自动变速器的目的是通过自动选择不同的齿轮比或 "速度 "为车轮提供动力，使发动机的最佳功率和扭矩特性与驾驶员所需的加速度和速度相匹配。
当变速器的输入速度传感器没有提供信号时，代码P0717就会被触发。 这是一个关键问题，因为如果没有这个信号，变速器控制模块或TCM就不能正确地将车辆从一个挡位换到另一个挡位，因为车辆需要改变速度和加速度。
有此故障代码的车辆应送至修理厂进行诊断。 查找修理厂
P0717 症状
- 发动机检查指示灯点亮
- 车辆无法正常换档
- 燃油经济性降低
- 在特殊情况下，驾驶员未发现任何不利条件
- 在某些情况下，可能会出现性能问题，例如在高速公路上行驶后停车时熄火和/或出现类似失火的症状。
触发P0717代码的常见问题
- 输入/涡轮转速传感器故障
- 输入/涡轮转速传感器接线或连接有缺陷
- 换档电磁阀故障
- 发动机冷却液温度传感器故障
- 阀体故障
- 变速箱油变脏，导致液压通道受限
常见误诊
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。
P0717 车间和技术人员诊断理论
当在动力总成计算机中设置代码 P0717 时，表示动力总成计算机或 PCM 没有看到来自输入/涡轮传感器的任何转速信号。 这可能意味着输入转速传感器和变速器输出转速传感器之间的转速差大于规定的转速。 这种情况可能发生在换挡过程中或以稳定的速度行驶时。这通常意味着变速器打滑。 通常情况下，变速器会自动切换到默认档位，发动机检查指示灯点亮。
当诊断P0717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。 密切注意发动机负荷、节气门位置、转速和路速，因为P0717可能很难检测到。 在数据流扫描仪上查看变速器输入和输出转速PID信息的同时对车辆进行路试。 如果出现P0717代码，则需要对其进行诊断。如果输入转速信号不可靠或不合理，则可能已验证代码 P0717。 请务必验证输入转速传感器的连接和接线以及挠性板或飞轮齿。 如果这些检查都正常，则很可能是输入转速信号传感器有缺陷。 请务必使用原装配件，并检查是否有任何适用的软件更新。
See_also: P0320 OBDII故障代码
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.
