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Home >> Subaru >> 2005 >> Outback R VDC Limited >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 13 (Diagnostic Trouble Code (DTC) Detecting Criteria (H4SO U5 (PZEV))) >> Diagnostic Trouble Code (DTC) Detecting Criteria >> DTC P0442 Evaporative Emission Control System Leak Detected (Small Leak) >> Outline Of Diagnosis >> Notes

Outline Of Diagnosis: Notes

WARNING: This page is about a different variant/trim than selected.

Perform the diagnosis of leakage of fuels system and valve functions.

Fig 1: Fuels System And Valve Functions Diagram - DTC P0442
G03829155Courtesy of SUBARU OF AMERICA, INC.

In this system diagnosis, checking for leakage and valve operation is conducted by changing the fuel tank pressure, and monitoring the pressure change using the fuel tank pressure sensor. 0.04-inch diagnosis is performed in the order of mode Z, mode A, mode B, mode C and mode D, and 0.02-inch diagnosis is performed in the order of mode A, mode B, mode C, mode D and mode E.