Subaru Impreza 2003 Service Manual page 1366

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
Step
1 CHECK ANY OTHER DTC ON DISPLAY.
Check
Is any other DTC displayed?
EN(H4DOTC)-190
Yes
Inspect the rele- Replace the fuel
vant DTC using level sensor. <Ref.
"List of Diagnostic to FU(H4DOTC)-
Trouble Code 63, Fuel Level
(DTC)". <Ref. to Sensor.> and fuel
EN(H4DOTC)-75, sub level sensor
List of Diagnostic <Ref. to
Trouble Code FU(H4DOTC)-64,
(DTC).> Fuel Sub Level
Sensor.>
NOTE:
In this case, it is
not necessary to
inspect DTC
P0461.
No