Subaru 2009 IMPREZA Service Manual page 582

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
1 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed?
Check
EN(H4SO)(diag)-165
ENGINE (DIAGNOSTICS)
Yes No
Check the appro- Replace the fuel
priate DTC using temperature sen-
the "List of Diag- sor. <Ref. to
nostic Trouble EC(H4SO)-13,
Code (DTC)". Fuel Temperature
<Ref. to Sensor.>
EN(H4SO)(diag)-
86, List of Diagnos-
tic Trouble Code
(DTC).>