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 MANUALSSUBARU2014FORESTER 2.5I, ENG CD FB25BA, STANDARD TRANSREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEENGINE CONTROL SYSTEMSFUEL INJECTION FUEL SYSTEMS (H4DO)OXYGEN SENSOR RELAYINSPECTION
2014 Subaru Forester 2.5i, Eng CD FB25BA, Standard Trans
Oxygen Sensor Relay: Inspection
2014 Subaru Forester 2.5i, Eng CD FB25BA, Standard TransSECTION Inspection
- Check that the oxygen sensor relay has no deformation, cracks or other damages.
- Measure the resistance between oxygen sensor relay terminals.
Courtesy of SUBARU OF AMERICA, INC.
Terminal No. Standard 1 and 2 1 MΩ or more 3 and 4 93.8 - 136.4 Ω (when 20°C (68°F)) - Connect battery positive terminal to terminal No. 3 and battery ground terminal to terminal No. 4, and measure the resistance between oxygen sensor relay terminals.
Courtesy of SUBARU OF AMERICA, INC.
Terminal No. Standard 1 and 2 Less than 1 Ω
RENDER: 1.0x
NO RELATED
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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.