Subaru 2004 LEGACY Service Manual page 64

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AB:DTC P0125 INSUFFICIENT COOLANT TEMPERATURE FOR CLOSED LOOP
FUEL CONTROL
DTC DETECTING CONDITION:
Two consecutive driving cycles with fault
TROUBLE SYMPTOM:
Engine would not return to idling.
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6DO)(diag)-40,
OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H6DO)(diag)-33, PROCEDURE,
Inspection Mode.>.
Step
1 CHECK ANY OTHER DTC ON DISPLAY.
2 CHECK TIRE SIZE.
3 CHECK ENGINE COOLANT.
Check the following items:
• Amount of engine coolant
• Coolant freeze
• Contamination of engine coolant
4 CHECK THERMOSTAT.
Check
Is any other DTC displayed?
Is the tire same size as speci-
fied tire and one same size as
other three wheels?
Is the engine coolant normal? Go to step 4.
Does the thermostat remain
opened?
EN(H6DO)(diag)-133
ENGINE (DIAGNOSTICS)
Yes
Inspect the rele- Go to step 2.
vant DTC using
"List of Diagnostic
Trouble Code
(DTC)". <Ref. to
EN(H6DO)(diag)-
66, List of Diag-
nostic Trouble
Code (DTC).>
NOTE:
In this case, it is
not necessary to
inspect DTC
P0125.
Go to step 3. Replace the tire.
Fill or replace the
engine coolant.
<Ref. to
CO(H6DO)-9,
INSPECTION,
Engine Coolant.>
Replace the ther- Replace the
mostat. <Ref. to engine coolant
CO(H6DO)-12, temperature sen-
Thermostat.> sor. <Ref. to
FU(H6DO)-18,
Engine Coolant
Temperature Sen-
sor.>
No