Evaporative Emission Control System Failure

FAULT ID
P0440

TITLE
Evaporative Emission Control System Malfunction

BACKGROUND
- The evaporative emission purge solenoid opens and closes while the engine is idling. Then the fuel compensation value change according to whether the evaporative emission canister emits purge air or not.
- The engine control module checks for this changes.

RANGE OF CHECK & SET CONDITIONS
When the evaporative emission purge solenoid opens and closes while the engine is idling the changes in the fuel compensation value is lower than the specified amounts.

EFFECT
Limp-in

PROBABLE CAUSES
- Evaporative emission purge solenoid failed.
- Open or shorted evaporative emission purge solenoid circuit, or loose connector.
- Purge hose connection or routing is defective.
- Engine control module failed.