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Home >> Subaru >> 2023 >> WRX Base, Standard Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostics) (2 Of 4) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0401: EGR Abnormal (EGR Amount Too Small) >> General Description >> Execution Condition

Execution Condition

Secondary parameters Execution condition
Battery voltage 10.9 V or more
Barometric pressure 75.06 kPa (563.1 mmHg, 22.2 inHg) or more
Ambient air temperature 7°C (44.6°F) or more
Engine speed Value of 1200 rpm - 2800 rpm
Vehicle speed 32 km/h (19.9 MPH) or more
Neutral switch OFF
Time while the fuel shut-off function is in operation 3000 ms or more
Compulsory drive of EGR valve open delay time (low flow rate monitor only) 800 ms or more