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Home >> Suzuki >> 2004 >> Vitara 4WD, Automatic >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine General Information & Diagnosis >> Diagnostic Information and Procedures >> DTC P0442, P0455: Evaporative Emission Control System Leak Detected >> System / Circuit Description
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System / Circuit Description

While engine running, ECM (PCM) closes EVAP canister vent valve and opens EVAP canister purge valve. If EVAP emission control system is in good condition, EVAP emission control system pressure that detected by fuel pressure sensor becomes down. After that, ECM (PCM) closes EVAP canister purge valve leaving EVAP canister vent valve is closed. If EVAP emission control system is in good condition, the fuel tank pressure rises specified rate.

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