Subaru IMPREZA 2004 Service Manual page 431

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step
1 CHECK ANY OTHER DTC ON DISPLAY.
2 CHECK THERMOSTAT.
S: DTC P0129 ATMOSPHERIC PRESSURE SENSOR CIRCUIT RANGE/PER-
FORMANCE
• DTC DETECTING CONDITION:
• Two consecutive driving cycles with fault
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO)(diag)-47,
OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4SO)(diag)-40, OPERATION,
Inspection Mode.>.
Step
1 CHECK ANY OTHER DTC ON DISPLAY.
Check
Is any other DTC displayed?
Does the thermostat remain
opened?
Check
Is any other DTC displayed?
EN(H4SO)(diag)-122
Yes
Check DTC using Go to step 2.
"List of Diagnostic
Trouble Code
(DTC)". <Ref. to
EN(H4SO)(diag)-
74, List of Diag-
nostic Trouble
Code (DTC).>
NOTE:
In this case, it is
not necessary to
inspect
DTC P0125.
Replace the ther- Replace the
mostat. <Ref. to engine coolant
CO(H4SO)-18, temperature sen-
Thermostat.> sor. <Ref. to
FU(H4SO)-27,
Engine Coolant
Temperature Sen-
sor.>
Yes
Check DTC using Replace the ECM.
"List of Diagnostic <Ref. to
Trouble Code FU(H4SO)-47,
(DTC)". <Ref. to Engine Control
EN(H4SO)(diag)- Module (ECM).>
74, List of Diag-
nostic Trouble
Code (DTC).>
NOTE:
It is not necessary
to inspect DTC
P0129.
No
No