Subaru 2002 IMPREZA Service Manual page 1481

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
Step
1 CHECK ANY OTHER DIAGNOSTIC TROU-
BLE CODE (DTC) ON DISPLAY.
Check
Is any other DTC displayed?
EN(TURBO)-321
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(TURBO)-48,
EN(TURBO)-75, Exhaust Tempera-
List of Diagnostic ture Sensor.>
Trouble Code
(DTC).>
NOTE:
In this case, it is
not necessary to
inspect DTC
P1312.
No