Subaru Legacy (2005 year). Service manual - part 456
EN(H6DO)(diag)-137
ENGINE (DIAGNOSTICS)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AD:DTC P0125 INSUFFICIENT COOLANT TEMPERATURE FOR CLOSED LOOP
FUEL CONTROL
DTC DETECTING CONDITION:
Detects when malfunction occurs in 2 continuous driving cycles.
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)-41,
OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H6DO)(diag)-34, PROCEDURE,
Inspection Mode.>.
Step
Check
Yes
No
1
CHECK ANY OTHER DTC ON DISPLAY.
Is any other DTC displayed?
Inspect the rele-
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.
2
CHECK TIRE SIZE.
Is the tire specified size and
one same size as other three
wheels?
Replace the tire.
3
CHECK ENGINE COOLANT.
Check the following items:
• Amount of engine coolant
• Coolant freeze
• Contamination of engine coolant
Is the engine coolant normal?
Fill or replace the
engine coolant.
<Ref. to
CO(H6DO)-12,
INSPECTION,
Engine Coolant.>
4
CHECK THERMOSTAT.
Does the thermostat remain
opened?
Replace the ther-
mostat. <Ref. to
CO(H6DO)-14,
Thermostat.>
Replace the
engine coolant
temperature sen-
sor. <Ref. to
FU(H6DO)-18,
Engine Coolant
Temperature Sen-
sor.>