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Home >> Subaru >> 2017 >> Outback 2.5i Limited >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostics) (P0171 To P0685) (H4DO) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0455: EVAP System (CPC) Leak Detected (Large Leak) >> Diagnostic Method >> Notes
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Diagnostic Method: Notes

Fig 1: Evaporative Leak Check Module Pressure Calculation Graph
G07669738Courtesy of SUBARU OF AMERICA, INC.
Mode Explanation of Mode Diagnosis Period
A Vacuum pump operation confirmation and characteristics stability 7 s or less & 300 s
B Measurement of reference pressure for setting the target negative pressure 40 s or less
C Switching valve operation confirmation 12 s or less
D Clogging of pipe diagnosis and leak pressure measurement 900 s or less
E Reference pressure measurement for judgment 40 s or less
Fig 2: Evaporative Leak Check Module Diagnostic Chart
G07669739Courtesy of SUBARU OF AMERICA, INC.