Subaru Impreza 2004 Service Manual page 109

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)(diag)-188
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)(dia sub level sensor
g)-74, List of Diag- <Ref. to
nostic Trouble FU(H4DOTC)-64,
Code (DTC).> Fuel Sub Level
Sensor.>
NOTE:
In this case, it is
not necessary to
inspect DTC
P0461.
No