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 Outback BaseFACTORY OEM SERVICE PROCEDURE
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| DTC | Description & trouble part | Condition | Number of driving cycles on the detecting condition |
|---|---|---|---|
| P26A3 | ENGINE COOLANT BYPASS VALVE "A" RANGE/PERFORMANCE | Battery voltage: 10.9 V or more [Engine Coolant Temperature 1]: 90°C (194°F) or more | 2 |
- Check that the battery voltage is 12 V or more and fuel remains approx. half [20 - 40 L (5.3 - 10.6 US gal, 4.4 - 8.8 Imp gal)].
- Using the Subaru Select Monitor, perform the clear memory of [Engine Control System]. Refer to COMMON (DIAG)>CLEAR MEMORY .
- Turn the blower fan switch to OFF.
- Start the engine and let it idle.
- Turn the blower fan switch to ON and wait for at least 10 seconds.
- Turn the blower fan switch to OFF and wait for at least 10 seconds.
- Read the temporary code using the Subaru Select Monitor or general scan tool. Refer to COMMON (DIAG)>DIAGNOSTIC TROUBLE CODE (DTC) .
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.
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