DTC Summary

WARNING: This page is about a different car, the 2018 Toyota Sequoia, 2017 Toyota Sequoia, and 2016 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.

DTC No.	Monitoring Item	Malfunction Detection Condition	Trouble Area	Detection Timing	Detection Logic
P0441	Purge VSV (Vacuum Switching Valve) stuck open	Leak detection pump creates negative pressure (vacuum) in EVAP system and EVAP system pressure measured. Reference pressure measured at start and at end of leak check. If stabilized pressure higher than [second reference pressure x 0.2], ECM determines that purge VSV stuck open.	Purge VSV Connector/wire harness (Purge VSV - ECM) ECM Canister pump module Leakage from EVAP system	While ignition switch off	2 trip
	Purge VSV stuck closed	After EVAP leak check performed, purge VSV turned ON (open), and atmospheric air introduced into EVAP system. Reference pressure measured at start and at end of check. If pressure does not return to near atmospheric pressure, ECM determines that purge VSV stuck closed.	Purge VSV Connector/wire harness (Purge VSV - ECM) ECM Canister pump module Leakage from EVAP system	While ignition switch off	2 trip
	Purge flow	While engine running, following conditions successively met: Negative pressure not created in EVAP system when purge VSV turned ON (open) EVAP system pressure change less than 0.4 kPa-g (3 mmHg-g) when vent valve turned ON (closed) Atmospheric pressure change before and after purge flow monitor less than 0.1 kPa-g (0.75 mmHg-g)	Purge VSV Connector/wire harness (Purge VSV - ECM) Leakage from EVAP line (Purge VSV - Intake manifold) ECM	While engine running	2 trip