Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Barometric Pressure (BARO) Sensor
BARO sensor measures barometric pressure of atmosphere. Variations in atmospheric pressure are converted to electrical signals and sent to PCM. The PCM uses this signal to adjust fuel mixture due to changes in altitude. The BARO sensor affects air/fuel ratio, EGR flow and spark advance.
The BARO sensor looks the same as Manifold Absolute Pressure (MAP) sensor, except the tubing nipple on BARO sensor is vented to the atmosphere and MAP sensor is connected to the intake manifold.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.