Skip the auto shop - Our mechanics make house calls

How Long Does a Barometric Sensor Last?

barometric sensor

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
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

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

More related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
How to Transfer a Car Title in Idaho
In order to prove ownership of a car, you must have the title. However, when a car is sold, given away or inherited, the title needs...
Veteran and Military Driver Laws and Benefits in Idaho
The state of Idaho offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch in the...


Related questions

Q: Problem with knock sensor or coils

Hi there, many others have reported shaking during idle with the Q45 around that time. Replacing the coils has been reported to fix the issue, however there are other components that could be affecting the engine's smoothness as well so...

Q: Stuck in first gear - 2001 Chrysler Neon

These codes reference a malfunction in the transmission assembly. The problem may be another sensor or an internal fault within the transmission. The best thing to do in this case would be to diagnose the gear issue and pinpoint the...

Q: Warning lights on the dash are always lit up

The O2 sensors on on this vehicle are a known issue, and generally speaking when the O2 sensors go bad they affect the Stability control system. There have been multiple instances of these sensors failing on Toyota's between 60-70K miles....