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Home >> Subaru >> 2006 >> Legacy GT spec.B >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> 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

Enable Condition

0.04-inch Diagnosis 

ENABLE CONDITION

Secondary Parameters Enable Conditions
Battery voltage ≥ 10.9 V
Barometric pressure ≥ 75.1 kPa (563 mmHg, 22.2 inHg)
Total time of canister purge operation 120 seconds or more
After engine starting 856 seconds or more
Learning value of evaporation gas density ≤ 0.08
Engine speed 1050 ← → 6500 RPM
Fuel tank pressure < 1.42 kPa (10.7 mmHg, 0.42 inHg)
Intake manifold relative vacuum (relative pressure) < -13.33 kPa (-100 mmHg, -3.94 inHg)
Vehicle speed ≥ 32 km/h (20 MPH)
Fuel level 9.6 ← → 54.4 (2.54 ← → 14.37 US gal, 2.11 ← → 11.97 Imp gal)
Closed air/fuel ratio control In operation
Fuel temperature -10 ← → 45°C (14 ← → 113°F)
Intake air temperature ≥ -10°C (14°F)
Pressure change per second < 0.12 kPa (0.95 mmHg, 0.04 inHg)
Minimum pressure change value every one second - Maximum pressure change value < 0.23 kPa (1.75 mmHg, 0.07 inHg)
Change of fuel level < 3 (3.2 US qt, 2.6 Imp qt)/131 milliseconds
Air fuel ratio 0.76 - 1.25

0.02-inch Diagnosis 

ENABLE CONDITION

Secondary Parameters Enable Conditions
(At starting a diagnosis)  
EVAP. diagnosis Incomplete
Battery voltage ≥ 10.9 V
Atmospheric pressure ≥ 75.1 kPa (563 mmHg, 22.2 inHg)
Time since last incomplete diagnosis event of 0.02-inch leakage > 600 sec.
Total time of canister purge operation 120 seconds or more
After engine starting 770 seconds or more
Fuel temperature -10 ← → 70°C (14 ← → 158°F)
Fuel level 9.6 ← → 4.4 (2.54 ← → 14.37 US gal, 2.11 → 11.97 Imp gal)
Intake manifold relative vacuum (relative pressure) < -13.3 kPa (-100 mmHg, -3.94 inHg)
Fuel tank pressure -0.43 - 1.43 kPa (-3.2 - 10.7 mmHg, -0.13 - 0.42 inHg)
Vehicle speed ≥ 68 km/h (42 MPH)
Closed air/fuel ratio control In operation
Engine speed 550 - 6000 RPM
(During diagnosis)  
Change of fuel level (1.3 US gal, 1.1 Imp gal/128 m/s)
Atmospheric pressure change (Mode D) -0.47 ← → 0.32 kPa (-3.5 ← → 2.4 mmHg, -0.14 ← → 0.09 inHg)
Atmospheric pressure change (Mode E) -0.32 ← → 0.32 kPa (-2.4 ← → 2.4 mmHg, -0.09 ← → 0.09 inHg)