How Long Does a Barometric Sensor Last?

The barometric sensor (also called the barometric pressure sensor, or BAP) is one of a number of sensors on cars that have computer-controlled engines. All it does is measure atmospheric pressure, essentially the same way that a weather barometer does. Then it sends the information to your car’s computer so that it can deliver the proper air/fuel mix to the engine.

Even though you can’t really see or touch air, it does have mass. Air weighs the most at sea level, and the higher up you go, the less the air weighs. What this means, simply stated, is that a car that is being operated at sea level is going to need a different fuel/air mix than one that is being operated in the mountains. Your BAP sensor is always working to let your car know how far above sea level you are, so the computer can ensure that the air/fuel mix is correct.

The BAP is not a part that is replaced on a routine schedule – its life isn’t calculated in terms of miles, or years. It is not a part that fails frequently, but like all electronic components in your vehicle, it can be vulnerable to corrosion as well as wear and tear. Signs that your barometric sensor is failing, or has failed, include:

  • Rough idle
  • Black smoke at tailpipe
  • Check Engine Light is on

If your car is displaying the above symptoms, you should have the barometric sensor checked and/or replaced by a qualified mechanic .


The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

Related articles

How Long Does an Air Cleaner Temperature Sensor Last?
An An air cleaner temperature sensor is not overly common on newer vehicles. This is because in order to ensure that your car engine operates the way it should, several electronic sensors may actually be needed. However, if you drive...
How Long Does an EGR Pressure Feedback Sensor Last?
In In today's world people are more aware of exhaust gases than ever before. With that said measures have been built into modern vehicles that are meant to cut down on the emissions released into the air. Built into your...
How to Replace a Transmission Position Sensor (Switch)
Transmission position sensors (TPS) switch ensures a car is in Neutral or Park when started and shuts the car down if it's not in the right gear.

Related questions

Check engine light just came on.
The P0320 trouble code (https://www.yourmechanic.com/article/p0320-obd-ii-trouble-code-ignition-distributor-engine-speed-input-circuit-malfunction-by-jamahl-walker) could very well indicate a bad camshaft sensor. The pinpoint test should be performed before replacing the sensor. If you need help with diagnosis, contact a mechanic for a diagnosis of the Check Engine Light...
I have a 2004 Buick Rendevouz that doesn't want to start. At first, it had a hesitation problem and it died at low rp
The camshaft position sensor will make the engine run but poorly. Check the crankshaft position sensor to see if its damaged or unplugged. A damaged crankshaft position sensor will cause a no spark condition. If you need further assistance with...
Would it be the crank sensor even if I have spark from the spark plugs
No it would not be the crankshaft sensor. It may be a camshaft sensor or another problem with the fuel system like relay for fuel pump. I recommend having a mechanic like one from YourMechanic diagnose the no start for...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com