Subaru LEGACY 2006 Manual page 246

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
1 CHECK ANY OTHER DTC ON DISPLAY.
2 CHECK FUEL FILLER CAP.
1) Turn the ignition switch to OFF.
2) Open the fuel flap.
3 CHECK PRESSURE/VACUUM LINE.
NOTE:
Check the following items.
• Disconnection, leakage and clogging of the
vacuum hoses and pipes between fuel tank
pressure sensor and fuel tank
• Disconnection, leakage and clogging of the
air ventilation hoses and pipes between fuel fill-
er pipe and fuel tank
Check
Is any other DTC displayed?
Is the fuel filler cap tightened
securely?
Is there any fault in pressure/
vacuum line?
EN(H4SO)(diag)-209
ENGINE (DIAGNOSTICS)
Yes No
Check the appro- Go to step 2.
priate DTC using
the "List of Diag-
nostic Trouble
Code (DTC)".
<Ref. to
EN(H4SO)(diag)-
70, List of Diag-
nostic Trouble
Code (DTC).>
Go to step 3. Securely install the
fuel filler cap.
Repair or replace Replace the fuel
the hoses and tank pressure sen-
pipes. sor. <Ref. to
EC(H4SO)-11,
Fuel Tank Pres-
sure Sensor.>