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Home >> Subaru >> 2011 >> Legacy Premium, Automatic CVT >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Diagnostic Trouble Code (DTC) Detecting Criteria (H4DOTC)) >> Diagnostic Trouble Code (DTC) Detecting Criteria >> DTC P0442 Evaporative Emission Control System Leak Detected (Small Leak) >> Enable Condition >> 4-inch Diagnosis

4-inch Diagnosis

WARNING: This page is about a different variant/trim than selected.
Secondary Parameters Enable Conditions
Battery voltage ≥ 10.9 V
Atmospheric pressure ≥ 75 kPa (563 mmHg, 22.2 inHg)
Total time of canister purge operation ≥ 120000 ms
Learning value of evaporation gas density < 0.08
Engine speed 1050 RPM - 4000 RPM
Fuel tank pressure ≥ -4 kPa (-30 mmHg, -1.2 inHg)
Intake manifold relative vacuum (relative pressure) ≥ - 13.3 kPa (- 100 mmHg, - 3.9 inHg)
Continuous time of the status where fuel level is 10.5 (2.77 US gal, 2.31 Imp gal) - 59.5 (15.72 US gal, 13.09 Imp gal) ≥ 37000 ms
Closed air/fuel ratio control In operation
Fuel temperature -10 °C (14 °F) - 45 °C (113 °F)
Intake air temperature ≥ -10 °C (14 °F)
Pressure change every 1 second < 1.7 mmHg (Mode A)
  < 1.7 mmHg (Mode D)
Minimum pressure change value every one second -- Maximum pressure change value every one second < 1.7 mmHg (Mode A)
  < 1.7 mmHg (Mode D)
Fuel level change every 128 milliseconds < Value of Map 6
Air fuel ratio 0.76 - 1.25
Elapsed time after starting the engine ≥ 856 s
or  
Elapsed time after starting the engine ≥ 335 s
  and
  Vehicle speed 72 km/h (44.7 MPH) or more
MAP 6 REFERENCE CHART

Fuel level ( , US gal, Imp gal) 10, 2.64, 2.2 20, 5.28, 4.4 25, 6.61, 5.5 30, 7.93, 6.6 43, 11.36, 9.46 45, 11.89, 9.9 50, 13.21, 11 60, 15.85, 13.2
Change ( , US gal, Imp gal) 4, 1.06, 0.88 5, 1.32, 1.1 6.5, 1.72, 1.43 4, 1.06, 0.88 5, 1.32, 1.1 5, 1.32, 1.1 6, 1.59, 1.32 8, 2.11, 1.76