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.

2020 Subaru Forester BaseFACTORY OEM SERVICE PROCEDURE

Secondary Pressure Sensor: Inspection

Check for oil leaks.
Check [secondary pressure sensor voltage.] of the secondary pressure sensor.
1. Connect the Subaru Select Monitor.
2. Turn the ignition switch to ON. (Engine OFF)
3. Display [secondary pressure sensor voltage.].
4. Start the engine and warm up completely.
5. Shift the select lever to "D range".
6. Shift the select lever to "P range".
7. Check [secondary pressure sensor voltage.] with the vehicle idling.
  Specification:
  
  Approx. 1.0 V
8. Stop the engine.
9. Turn the ignition switch to ON. (Engine OFF)
10. Check [secondary pressure sensor voltage.].
  Specification:
  
  Approx. 0.5 V

Factory Service Tools

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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.