Subaru Legacy 2004 Service Manual page 902

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
AA:DTC P0223 THROTTLE/PEDAL POSITION SENSOR/SWITCH "B" CIRCUIT
HIGH INPUT
DTC DETECTING CONDITION:
Immediately at fault recognition.
TROUBLE SYMPTOM:
• Erroneous idling
• Poor driving performance
• Engine stalls.
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)-
41, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4SO 2.5)(diag)-34, Inspection Mode.>.
EN(H4SO 2.5)(diag)-143