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.
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HOMESERVICE MANUALSHYUNDAI1991SONATA V6-3.0LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSBAROMETRIC PRESSURE SENSORDESCRIPTION AND OPERATION
1991 Hyundai Sonata V6-3.0L
Barometric Pressure Sensor: Description and Operation
1991 Hyundai Sonata V6-3.0LSECTION Description and Operation
Air Flow Sensor Location:
The Barometric Pressure Sensor installed on the Air Flow Sensor (AFS) senses the atmospheric pressure and converts it into a voltage which is sent to the ECU. The ECU uses this signal to compute the altitude at which the vehicle is running, accordingly correcting the air-fuel ratio and the ignition timing, thus improving driveability at high altitude.
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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.