Subaru 2009 IMPREZA Service Manual page 1389

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step
1 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed?
Check
EN(H4DOTC)(diag)-168
Yes No
Check the appropri- Replace the waste-
ate DTC using the gate control sole-
"List of Diagnostic noid valve. <Ref. to
Trouble Code FU(H4DOTC)-47,
(DTC)". <Ref. to Wastegate Control
EN(H4DOTC)(diag) Solenoid Valve.>
-83, List of Diagnos-
tic Trouble Code
(DTC).>