Subaru Impreza 2003 Service Manual page 1473

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
Step
1 CHECK ANY OTHER DTC ON DISPLAY.
Check
Is any other DTC displayed?
EN(H4DOTC)-297
ENGINE (DIAGNOSTICS)
Yes
Inspect the rele- Replace the
vant DTC using exhaust gas tem-
"List of Diagnostic perature sensor.
Trouble Code <Ref. to
(DTC)". <Ref. to FU(H4DOTC)-48,
EN(H4DOTC)-75, Exhaust Tempera-
List of Diagnostic ture Sensor.>
Trouble Code
(DTC).>
NOTE:
In this case, it is
not necessary to
inspect DTC
P1312.
No