LEMON Manuals: Even more car manuals for everyone
Home >> Subaru >> 2016 >> Legacy 2.5i >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls (H4DO) (Diagnostics) (2 Of 4) >> DTC P0420 Catalyst System Efficiency Below Threshold Bank 1 >> Execution Condition

Execution Condition

Secondary Parameters Execution condition
Battery voltage ≥ 10.9 V
Barometric pressure ≥ 75.1 kPa (563 mmHg, 22.2 inHg)
Sub feedback In operation
Intake air amount ≥ 8 g/s (0.28 oz/s)
  and
  < 45 g/s (1.59 oz/s)
Estimated catalyst temperature ≥ 570 °C (1058 °F) (CVT model)
  ≥ 575 °C (1067 °F) (MT model)
Vehicle speed ≥ 40 km/h (24.9 MPH)
Rear oxygen output change from 0.55 V or less to 0.55 V or more Experienced after fuel cut
ELCM switching valve Open
Estimated temperature of the rear oxygen sensor element ≥ 500 °C (932 °F)