P1448 Lexus EVAP Canister Vent Control Valve Open
Possible causes
– EVAP canister vent control valve
– EVAP canister is saturated with water
– EVAP control system pressure sensor and the circuit
– Blocked rubber tube to EVAP canister vent control valve
– Water separator
– EVAP canister is saturated with water
– EVAP control system pressure sensor and the circuit
– Blocked rubber tube to EVAP canister vent control valve
– Water separator
Tech description
Start by checking for damage EVAP canister or hoses. If no hoses are damage the EVAP canister vent control valve may have to be replaced.
What about the obd code?
EVAP canister vent control valve remains open under specified driving conditions.
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P1448 Lexus Description
The EVAP canister vent control valve is located on the EVAP canister and is used to seal the canister vent.
This solenoid valve responds to signals from the ECM. When the ECM sends an ON signal, the coil in the solenoid valve is energized. A plunger will then move to seal the canister vent. The ability to seal the vent is necessary for the on board diagnosis of other evaporative emission control system components.
This solenoid valve is used only for diagnosis, and usually remains opened. When the vent is closed, under normal purge conditions, the evaporative emission control system is depressurized and allows EVAP Control System (Small Leak)diagnosis.
Lexus Vehicle:Lexus ES,Lexus GS,Lexus GX,Lexus HS,Lexus IS,Lexus LFA,Lexus LS,Lexus LX,Lexus RX,Lexus RX,Lexus SC,Lexus GS350,Lexus GS450H,Lexus IS250,Lexus GX460,Lexus IS350,Lexus LS460,Lexus LS600H,Lexus LX570,Lexus RX350