Home >> Scion >> 2014 >> FR-S Standard Trans >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Engine Control System (Diagnostic Codes (P0171-U0560) >> SFI System >> DTC P0506: Idle Air Control System RPM Lower than Expected; DTC P0507: Idle Air Control System RPM Higher than Expected >> Typical Malfunction Thresholds