Barometric Pressure Made Easy!

A few years back, I wrote a post about determining barometric pressure based on location. This is important when troubleshooting the “Barometric Pressure – Data Erratic, Intermittent or Incorrect” fault code. It has been a while, so I thought it would be a good idea to update the post with a new link to quickly obtain the barometric pressure information.

A barometric pressure (BARO) sensor is internally installed inside the ECM and converts BARO into a voltage signal. ECM then uses this voltage signal for calibration of the fuel injection quantity and injection timing for altitude compensation.

The DTC sets once the ECM has detected an excessively low signal voltage. Here is a quick way to determine Barometric Pressure for your location. Some DTCs require this information for diagnosis.

1. Open up your Internet browser and go to https://weather.com/
2. Enter your state or city into the search bar
3. Hit ENTER and your requested area weather displays
4. Near the top, under “Right Now” look for pressure. That will be the “barometric pressure” for your current location.