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Home >> Toyota >> 2015 >> Prius Three >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostic Codes (P0300-P0657)) (Except Plug-In) >> SFI System >> DTC P0401: Exhaust Gas Recirculation Flow Insufficient Detected [08/2014 - ] >> Typical Enabling Conditions
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Typical Enabling Conditions

Monitor runs whenever following DTCs are not stored 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 20 km/h (12.5 mph) or more
Engine coolant temperature 70°C (158°F) or higher
Auxiliary battery voltage 11 V or higher
Intake air temperature -10°C (14°F) or higher
Atmospheric pressure 76 kPa(abs) [750 mmHg(abs)] or higher