气压传感器，通常称为气压气压传感器（BAP），是许多车辆上常见的一种发动机管理传感器。它负责测量车辆驾驶的环境的大气压力。不同的环境将具有不同的大气压，这将影响车辆的运行方式。高海拔的空气将较薄，这意味着在进气冲程期间，发动机对发动机的氧气较少，这将需要不同量的燃料。

BAP类似于引擎MAP sensor。但是，BAP测量发动机外部的压力，而地图则测量了歧管内部的压力。计算机通常会解释两个传感器的数据以确定最佳timingand fuel conditions for optimum engine performance. For this reason,when BAP sensors fail，，，，they can cause engine performance problems. When they do fail, the vehicle will usually produce a few symptoms that can notify the driver that there may be a problem that应该维修。

Poor engine performance, sluggish acceleration, and lack of power

A symptom commonly associated with a problematic barometric pressure sensor is a poorly performing engine. If the BAP sensor malfunctions, it can send an incorrect signal to the computer which may have a negative effect on engine performance. The reading from the BAP sensor helps to determine fuel and timing conditions, so if the signal is compromised for any reason, then the computer calculations will be thrown off. This may result in缓慢的加速度，，，，缺乏力量，，，，and失火在更严重的情况下。

检查引擎灯开启

Another common symptom of a failed BAP sensor is anilluminated Check Engine Light。如果计算机解决了BAP传感器或信号的问题，它将照亮检查引擎灯，以提醒驾驶员检测到问题。

BAP sensors are important components found on many modern engine management systems. While they are simple in nature because they operate using atmospheric pressure, they can be difficult to test. For this reason, if you suspect that your BAP sensor may be having a problem, or your Check Engine Light has come on, have the vehicle inspected by a professional technician, such as one from YourMechanic. They will be able to determine if your car needs abarometric sensor replacement，或进行其他任何合适的维修。