DTC Summary

DTC SUMMARY

DTC No.	Monitoring Item	DTC Detection Condition	Trouble Area	Detection Timing	Detection Logic
P0441	EVAP VSV (Vacuum Switching Valve) stuck open	Vacuum pump creates negative pressure (vacuum) in EVAP system and EVAP system pressure is measured. 0.02 inch leak pressure standard is measured at start and at end of leak check. If stabilized pressure is higher than [second 0.02 inch leak pressure standard x 0.2], ECM determines that EVAP VSV is stuck open	EVAP VSV Connector/wire harness (EVAP VSV - ECM) ECM Pump module Leakage from EVAP system	While engine switch off	2 trip
P0441	EVAP VSV stuck closed	After EVAP leak check is performed, EVAP VSV is turned ON (open), and atmospheric air is introduced into EVAP system. 0.02 inch leak pressure standard is measured at start and at end of the check. If pressure does not return to near atmospheric pressure, ECM determines that purge valve is stuck closed	EVAP VSV Connector/wire harness (EVAP VSV - ECM) ECM Pump module Leakage from EVAP system	While engine switch off	2 trip
P0441	Purge flow	While engine is running, following conditions are successively met: Negative pressure is not created in EVAP system when EVAP VSV is turned ON (open) EVAP system pressure change is less than 0.5 kPa (3.75 mmHg) when vent valve is turned ON (closed) Atmospheric pressure change before and after purge flow monitor is less than 0.1 kPa (0.75 mmHg)	EVAP VSV Connector/wire harness (EVAP VSV - ECM) Leakage from EVAP line (EVAP VSV - Intake manifold) ECM	While engine running	2 trip