Subaru 2009 IMPREZA Service Manual page 1376

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
1 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed?
Check
EN(H4DOTC)(diag)-155
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(H4DOTC)-16,
Code (DTC)". Fuel Temperature
<Ref. to Sensor.>
EN(H4DOTC)(diag
)-83, List of Diag-
nostic Trouble
Code (DTC).>