OBD-II Trouble Code

P1448

P1448 - EVAP canister vent control valve open

P1448 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.

Symptoms

- Engine Light ON (or Service Engine Soon Warning Light)

When is the code detected?

EVAP canister vent control valve remains open under specified driving conditions.

Possible Causes

EVAP control system pressure sensor and the circuit

Blocked rubber tube to EVAP canister vent control valve

EVAP canister vent control valve

Water separator

EVAP canister is saturated with water

Possible Solution

Editor Notes