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 MANUALSSUBARU1996LEGACY WAGON 4WD F4-2.2L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSBAROMETRIC PRESSURE SENSORDESCRIPTION AND OPERATION
1996 Subaru Legacy Wagon 4WD F4-2.2L SOHC
Barometric Pressure Sensor: Description and Operation
1996 Subaru Legacy Wagon 4WD F4-2.2L SOHCSECTION Description and Operation
Description
- The Pressure Sensor is used in A/T vehicles. It is located in the Engine compartment at the front of the right-hand suspension. It consists of a solenoid which switches between the atmospheric pressure and suction pressure lines and a Pressure Sensor. This arrangement allows either pressure line to be monitored.
- A sensor output signal is sent to the Engine Control Module (ECM) to diagnose the Exhaust Gas Recirculation (EGR) system and Evaporative Emission Control System.
- The Pressure Sensor is not used in M/T vehicles.
- The Pressure Sensor is used in A/T vehicles. It is located in the Engine compartment at the front of the right-hand suspension. It consists of a solenoid which switches between the atmospheric pressure and suction pressure lines and a Pressure Sensor. This arrangement allows either pressure line to be monitored.
- A sensor output signal is sent to the Engine Control Module (ECM) to diagnose the Exhaust Gas Recirculation (EGR) system and Evaporative Emission Control System.
- The Pressure Sensor is not used in M/T vehicles.
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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.