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 MANUALSSUBARU2004OUTBACK LIMITED, 4D SEDAN, EJ259REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMDIAGNOSTIC TROUBLE CODE (DTC) DETECTING CRITERIA (H4SO U5 (PZEV))DIAGNOSTIC TROUBLE CODE (DTC) DETECTING CRITERIADTC P1446: FUEL TANK SENSOR CONTROL VALVE CIRCUIT LOWOUTLINE OF DIAGNOSIS
2004 Subaru Outback Limited, 4D Sedan, EJ259
Outline Of Diagnosis
2004 Subaru Outback Limited, 4D Sedan, EJ259SECTION Outline Of Diagnosis
Detect the open or short circuit of tank pressure switching solenoid.
Judge NG when the ECM output level is different from actual terminal level.
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.