汽车spn和5571故障什么意思

汽车SPN和5571是两个被广泛使用的故障代码，这些代码能够让车辆的使用者或维修人员快速识别车辆出现的问题。在车辆的仪表板上，SPN和5571通常会与相应的指示灯一起显示。

SPN故障

SPN指的是“标准参数编号”，其作用是检测车辆的传感器和控制器的工作状态，帮助诊断车辆故障。当SPN指示灯亮起时，代表车辆出现了某种问题。例如，SPN 101 FMI 2代表柴油发动机怠速控制器出现问题。

需要注意的是，SPN故障指示灯的亮起并不一定代表车辆会立即失去作用，但是，如果忽略这些故障并不采取相应措施，车辆的状况可能会逐渐恶化。

5571故障

5571代表的是“IPR控制电流故障”，这是某些柴油车型的故障代码。这个故障通常由于发动机的高压油泵或者油压调节器出现问题造成。

如果你的车辆出现了5571故障代码，最好找到一个专业的机械师进行检查和维修。否则，这个故障可能会导致引擎无法启动或者严重的发动机损坏。

总之，当你看到车辆的仪表板上出现SPN和5571故障代码时，最好及时采取措施进行修复，避免状况恶化。

Understanding the meaning of SPN and 5571 fault codes in vehicles

Modern-day vehicles are equipped with a range of sensors and systems that help to ensure their smooth functioning. One of the critical aspects of a vehicle's computer system is the ability to identify and troubleshoot errors as they arise. SPN and 5571 are some of the most common fault codes experienced in vehicles, and it is important to understand their meaning.

SPN stands for Source Address of the Fault. It is a unique number assigned to a particular fault detected by the vehicle's computer system. This code helps to pinpoint the exact location where the error occurred, making it easier for auto mechanics to diagnose and repair the problem.

5571 is a specific SPN code that is associated with the AdBlue tank level sensor. The AdBlue system is a component of the vehicle's emissions control mechanism that is responsible for reducing diesel engine emissions. The system uses a liquid known as AdBlue, which is injected into the exhaust gases to reduce nitrogen oxides (NOx). When the AdBlue tank level sensor detects that the tank level is low, it triggers the 5571 fault code, indicating that the AdBlue system requires attention.

It is important to note that the 5571 fault code can also be triggered if there is an issue with the AdBlue pump or injector. Therefore, it is essential to have the vehicle diagnosed by a professional mechanic to rule out other potential issues before replacing any parts.

SPN and 5571 fault codes are critical for troubleshooting errors in modern-day vehicles. The SPN code helps to pinpoint the location of the fault, while the 5571 code is specific to the AdBlue tank level sensor, which is an essential component of the emissions control system. As with any vehicle fault code, it is important to have the vehicle diagnosed by a professional mechanic to ensure accurate identification and repair of the problem.