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.
2001 Subaru Outback Base, AutomaticFACTORY OEM SERVICE PROCEDURE
DTC P1443: EVAP System Vent Control Function Problem
- Perform basic diagnostic procedure. See BASIC DIAGNOSTIC PROCEDURE
. If any DTCs other than P1443 exist, repair those DTCs first. If DTC P1443 is only DTC set, check the following:
- Blockage of drain filter.
- Blockage of vent hose between drain valve and drain filter.
- Blockage of vent hoses between canister and drain valve.
Repair as necessary. If no problem was found, go to next step.
- Turn ignition off. Connect test mode connector. See Figure . Connect scan tool to DLC. Turn ignition on. While using scan tool to command drain valve on and off, listen for clicking sound from valve. If clicking sound was heard, contact authorized Subaru dealership because probable cause is deterioration of multiple parts. If no clicking sound was heard, replace drain valve. Clear memory and perform verification procedure. See CLEARING DIAGNOSTIC TROUBLE CODES and VERIFICATION PROCEDURE .
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.