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Home >> Toyota >> 2012 >> Prius Three >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Engine Control System (Except Plug-In) (Diagnostic Codes (P0010-P043F)) >> SFI System >> DTC P0401: Exhaust Gas Recirculation Flow Insufficient Detected >> Typical Enabling Conditions
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Typical Enabling Conditions

Monitor runs whenever following DTCs are not present None
Time after engine started 3 seconds or more
Time after engine fuel cut 2000 msec or more
Engine speed 950 to 1600 rpm
Vehicle speed 12.5 mph (20 km/h) or more
Engine coolant temperature 70°C (158°F) or more
Auxiliary battery voltage 11 V or more
Intake air temperature -10°C (14°F) or more
Atmospheric pressure 76 kPa(abs) [750 mmHg(abs)] or more