DTC Summary

WARNING: This page is about a different car, the 2019 Toyota Highlander, 2018 Toyota Highlander, and 2017 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory
P2450	Fuel Vapor-containment Valve Stuck Open	Either of the following conditions is met when fuel tank pressure is between -2 and 3 kPa (gauge) [-0.3 and 0.4 psi (gauge)]. Fuel tank pressure change when vacuum introduction for canister is less than 0.5 kPa (gauge) [0.07 psi (gauge)] EVAP pressure when vacuum introduction for canister was complete is higher than (third reference pressure x 0.2)	Fuel vapor-containment valve Connector/wire harness (fuel vapor-containment valve - ECM) ECM	Comes on	DTC stored
P2451	Fuel Vapor-containment Valve Stuck Closed	Either of the following conditions is met: Fuel tank pressure change when vacuum introduction for canister is less than 0.5 kPa (gauge) [0.07 psi (gauge)] EVAP pressure change when fuel vapor-containment valve is open is less than 0.9 kPa (gauge) [0.13 psi (gauge)]	Fuel vapor-containment valve Connector/wire harness (fuel vapor-containment valve - ECM) ECM	Comes on	DTC stored

DTC No.	Monitoring Item	Detection Timing	Detection Logic
P2450	Fuel vapor-containment valve stuck open	EVAP monitoring (Power switch off)	2 trip
P2451	Fuel vapor-containment valve stuck closed	EVAP monitoring (Power switch off)	2 trip