Subaru IMPREZA GD 2007 Series Manual page 1539

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step
1 CHECK FUEL FILLER CAP.
1) Turn the ignition switch to OFF.
2) Open the fuel flap.
2 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 the fuel filler cap tightened
securely?
Is there any fault in pressure/
vacuum line?
EN(STI)(diag)-208
Yes No
Go to step 2. Tighten fuel filler
cap securely.
Repair or replace Replace the fuel
the hoses and tank pressure sen-
pipes. sor. <Ref. to
EC(H4DOTC)-15,
Fuel Tank Pres-
sure Sensor.>